Showing posts with label molecular-gastronomy. Show all posts
Showing posts with label molecular-gastronomy. Show all posts

Friday, April 20, 2012

Is cooking with hydrogen peroxide an accepted practice?

Question

I had some pork (shoulder) I had to use today, suspecting it might be unsafe tomorrow.

So I thought I'd soak it in some hydrogen peroxide, about 2-3% concentration to at least get rid of any surface bacteria.

After about 10 minutes, the pork looked half-cooked and felt extremely pliable. I assume the proteins had denatured like in a ceviche. Stir-frying it quickly to finish it off took less than a minute and it was really tender.

Is cooking with hydrogen peroxide an accepted practice?

Asked by jontyc

Answer

The Hong Kong Centre for Food Safety offers the following information and advice:

Use of Hydrogen Peroxide in Food Processing

  1. Because of its strong oxidising property, hydrogen peroxide is used as a bleaching agent in some foods such as wheat flour, edible oil, egg white etc. in countries like the US, Canada, Australia and New Zealand.
  2. It is also allowed to be used as an antimicrobial agent in food, e.g. milk, and as a sterilizing agent for food packaging materials.

and

Safety of Hydrogen Peroxide

  1. Oral ingestion of 3% hydrogen peroxide solutions (household strength) generally does not result in severe toxicity but may result in vomiting, mild irritation to mucosa and burns in the mouth, throat, oesophagus and stomach. Ingestion of higher concentration, e.g. >10%, can result in more dangerous sequelae such as burns to mucus membranes and gut mucosa.
  2. Hydrogen peroxide is unstable and would decompose in contact with food and after cooking.

and, finally,

Advice to the Trade

  1. If hydrogen peroxide is used in processing food, only food grade hydrogen peroxide should be used in processing food.

  2. The amount of hydrogen peroxide to be used in food processing should be limited to the amount sufficient for the purpose.

  3. Appropriate measures should be taken to remove residual hydrogen peroxide from the finished products.

Based on this information, it seems there is some precedent for using hydrogen peroxide in a cooking environment.

Answered by Eli Lansey

Sunday, April 8, 2012

Why was there not enough foam in my garlic foam with soy lecithin?

Question

This was my first attempt at making a foam using soy lecithin. I used 3 garlic cloves, 2/3 cup water, 2/3 cup milk. Then i used an immersion blender. I got a bit of foam on top but there wasnt a lot of it. It felt like a waste of a lot of milk. How much foam should I be expecting?

For now, I put the foamy mixture in the fridge, is there a way to salvage and get more foam?

Asked by moorecats

Answer

Just an idea... I've had problems making foam because of hard/basic tap water (a lot of chalk in the water) - making frape though, not garlic foam:) Foam will more easily form in soft water as you can easily test with a piece of soap. If you have hard tap water you could try using boiled water (some of the chalk in the water will react and leave a residue on the bottom of the pot) or bottled water with pH 7 (neutral). Another idea would be to add just enough acid for neutralisation but I imagine that could be a bit tricky and you'd risk the milk curdling so I wouldn't recommend it.

Answered by Heidi Larsen

Friday, March 23, 2012

Is there any trick to make a palindrome-cocktail?

Question

I'm trying to make a palindrome cocktail:

  • made by building the components, like for example the classic B52; and also
  • having the same ingredients going from top to bottom as it has going from bottom to top.

At first I thought it was surface tension that separated the layers of a built cocktail. However, it seems it is density that determines where a particular component will go. One of the resources on density I found was this spirits density chart. Now, of course: no particular spirit is found twice on that chart! This makes the palindrome cocktail quite a challenge.

The Question: Are there any products, tricks or techniques available to separate layers in a built cocktail without relying on density?


Some brainstorm-ideas I came up with but have no faith (yet) in trying:

  • Separate layers with a sort-off crême-brûlée-style crust. However this will most not seall off completely on the edges, plus I risk setting the spirits on fire.
  • Use some kind of gelatine product?

As a side note, even though my question is about a true palindrome drink (with the exact same spirits top-down as bottom-up), if there are no real tricks, I'd also be interested to see some added suggestions on a "fake" palindrome where it's just "looks" like a palindrome (color/transparancy wise). I tried this, but given the above density chart that felt as a hard-enough challenge in itself.


Logged attempts

I'll update this section as I experiment with provided answers (but the question above won't change, of course).

Palindrome-cocktail pt 2

  • A Cointreau + Baileys + butterscotch liquor. An attempt to make a color-based palindrome (a cheat!), but the colors are obviously not similar enough.
  • B Dark Rum + Cointreau + Dark Rum. The bottom dark rum was mixed with gome syrup and even more sugar (as much as would dissolve) to make it sink to the bottom. Based on this answer below. Still have to work on color though.

Palindrome-cocktail jello-style

  • J1 Cherry-butterscotch-jello + lemon liquor + cherry-butterscotch-jello. The top jello kind-of sunk inside the middle melon layer.
  • J2 Cherry-butterscotch-jello + lemon liquor + cherry-butterscotch-jello. Same as J1, only more careful sliding the top jello in on the back of a spoon.
  • J3, the proof of concept! Melon-liquor + cherry-butterscotch-jello + lemon liquor. First I put the bottom liquor in the freezer, then the jello on top (wiggle it in place), then more liqour on top, and wait a few minutes for the bottom layer to melt.

Footnote

Although I'd accept any tricks that allow a basic palindrome-cocktail, I'd be extra happy if they allow for palindromes above 3 layers (so 5 layers and up).

Asked by Jeroen

Answer

You could, of course, create gel layers, and the determining factor in stability would be the firmness of those gels. However - and I suppose this is just a hunch - I seriously doubt that a gel firm enough to hold the weight of all the heavier layers above it (and you are asking for at least 3) would really be drinkable, unless you're aiming for the consistency of a "Jello shot".

A better idea, in my opinion, would be to simply change the densities of certain layers, and an effective (and tasty) way to do that is with sugar, or more accurately, sugar syrup. There's a type of syrup used in bartending called Gomme Syrup, which is a thick sugar syrup with Gum Arabic added to prevent crystallization (among other things).

Sugar, by itself, has very poor solubility in alcohol, but sugar syrups and gomme syrup in particular will have few problems, considering that's already how many mixed drinks are made (like Whiskey Sour). If you're feeling really adventurous, you could also use sugar alcohols such as sorbitol or xylitol, which dissolve readily in ethyl alcohol in solid form. However, these are much more potent (sweetness-wise) than sucrose and some people report gastrointestinal reactions, so use at your own risk.

Sugar syrups are very dense, so if you mix them thoroughly with a particular spirit, you'll end up with a heavier (and sweeter) version of that spirit. So to make your palindrome, start with what you'd normally put at the top (say GM for the B52), mix it with syrup (it shouldn't take an excessive amount - maybe 20-30% by volume, but you'll have to experiment), and layer that on the bottom. Then take the next-lightest, mix it with slightly less syrup, and continue. Once you reach what would normally be the densest liquid, layer the drink as normal up to the top with the "pure" spirits.

The more layers, the more math you'll have to do, because you'll need to make sure that you add just enough syrup to layer 2 so that it's lighter than layer 1 (bottom) but still heavier than layer 3, and so on. Unless you're prepared to make the drink very sweet, you'll need to be fairly precise in your calculations.

Disclaimer: I haven't yet tried this myself, as it's the first I've heard of anyone trying to do this. However, I see no reason why it wouldn't work with proper (careful) layering technique. In fact, I remember doing something very similar all the way back in primary school, called rainbow in a glass.

Answered by Aaronut

Saturday, March 17, 2012

How can I integrate molecular gastronomy in to regular cooking?

Question

I love the science-y, geeky side of cooking and molecular gastronomy really appeals to me. I've been experimenting with it for a while. The issue I have is that it tends to become an end in and of itself rather than an integral part of a dish. This is a criticism that is often leveled at the molecular gastronomy chefs. While I can get some really "wow" textures, flavors, or presentations, I never feel like I have a coherent, integrated dish.

I don't think it even needs to be "regular", it just needs to be coherent and not gimmicky. The surprise / wow factor of the texture can't be the main point of the dish, it needs to be the flavor. For what it's worth, I think Grant Achatz probably does the best job of using molecular gastronomy to augment a dish rather than controlling it.

I've had some wonderful molecular gastronomy dishes, but they always seem to rely on the novelty of the presentation / technique as the main interest in the dish rather than flavor pairings. Whatever the molecular aspect of the cooking is, it's presented as the dominant aspect of the dish. I'm interested in incorporating it so that it enhances my dish rather than defining it.

How can I use molecular gastronomy as a part of a dish in an interesting way, without it just becoming a gimmick?

Asked by n/a

Answer

Wow. This is a big topic. As someone who is deeply interested in this cooking movement, let me try and suggest a few things.

First, reading this article would be a very good start. In it, Ferran Adria/Harold McGee/Heston Blumenthal and Thomas Keller (not exactly a man known for avant garde cuisine) put forth the position that in essence there is no such thing as molecular gastronomy, it is merely a logical continuation of cooking techniques that have stood the test of time.

Bearing that in mind, I think what you're asking is 'how do I paint from the new palette that Adria has spearheaded?'

The answer is both simple and complex. At its most basic, MG is about playing with perception, and tries to look at food in a couple of different ways. First is what is widely known as deconstruction: taking a well known dish and reimagining it in order to play up a specific flavour from the dish, provide the same flavours with new textures, or provide a new spin on the dish. Even something as simple as substituting a pancetta cracker on a Caesar salad instead of lardons is fundamentally deconstructive in its approach.

What Adria does is out there at the absolute bleeding edge of cuisine. He views texture and flavour as separate things, and during their working sessions at elBullitaller and in the restaurant (which is, sadly, closing as a restaurant on 31 July of next year) they focus on presenting interesting flavour and texture combinations. Blumenthal and Achatz, by contrast, aim at providing more recognizable food and trying to make the 'molecular' processes in the dish more transparent.

So look at some of the things you make on a regular basis. How can you highlight a specific flavour? How can you change perception of the dish? As an example, I was thinking last night of making bite-size creme brulee; encapsulate the creme using the calcium/alginate method and set with gelatine, make spheres. Modifying Adria's technique for his pumpkin oil sweet (from A day at elBulli), one can then coat the whole thing with a crunchy layer of caramelized isomalt. Alternatively, use his method for adding a layer of caramel to an egg yolk. Voila... reimagined dish that everyone will recognize in flavour, but very different in texture and how it behaves in the mouth. Garnish and so on are then up to you.

But that may be going too far for you. So let's look at some other ideas. A restaurant I used to work at served a sous vide short rib that was actually two pieces of (bone out) short rib meat glued together with transglutaminase, allowed to bond overnight, then cooked sous vide for 24 hours until medium rare all the way through. Beyond that, the rest of the dish was grounded very solidly in classic French technique. To the guest, the 'molecular' aspect of the meal was entirely transparent.

Or consider the classic combination of smoked salmon/dill/lemon/cream cheese. You could make a foam of the cheese (to reduce the claggy mouthfeel while sacrificing no flavour), mix in encapsulated lemon caviar (to provide a textural counterpoint when your guest crushes it with their teeth), and dress the whole with a dill oil. Same flavours, slightly different textures... and it's all 'molecular.' You could go way out there and infuse the cheese with the flavour of smoked salmon, or make a smoked salmon cracker or whatnot, but I think that is going too far for you.

A dish I was working on at the restaurant (and have had to abandon for now, due to switching jobs) was a simple coconut cream pie, deconstructed into a napoleon-esque stack. But instead of pastry, I made coconut crackers with methylcellulose and coconut water. The pastry cream was made with coconut milk instead of cream (note: you need to leave the cream overnight for the flavour to develop properly; also ensure you cook it long enough to cook out the cornstarch). To be served with a toasted coconut macaroon of sorts (coconut bound with barely enough lightly whisked egg white to hold it together, baked until toasted) and a white chocolate and lemon sable cookie to provide the missing pastry flavour, and a little chantilly enhanced with Malibu rum. Again... molecular elements, but largely transparent to the diner. The focus was on providing the most intense coconut experience I could come up with.

At its base, MG is really about finding the truest and purest expressions of flavour. If you look at most MG-centric dishes, they focus on a single flavour with everything else on the plate providing a supporting or contrasting role. Not all that different from classic techniques, is it?

One of the other approaches to creating a new dish that Adria uses is to consider a single ingredient, and what works well with that. Exploring flavour compound databases is a really good way to go about this process. Here is one that I find useful, even if the design is stuck somewhere circa 1995. It is a method that Blumenthal uses extensively, which is how he came up with his salmon coated in licorice (not that far a stretch, given the affinity of tarragon and fennel for fish), as well as the sounds-bizarre-but-is-delicious combination of cauliflower and chocolate. Easy recipe: clean and cut your cauliflower into florets. Dust lightly with cocoa powder, coating each piece. Shake off excess. Season with salt and pepper, roast approx 15 minutes at 375. Sounds weird, yeah? Well, turns out that cauliflower and chocolate both share distinctive flavour chemicals. So they go well together.

At its heart, molecular gastronomy really is just the same classic techniques we are familiar with. The key difference is that it asks three questions:

  • How? (do we make this better/enhance this flavour/provide a new texture)
  • Why? (do we put these flavours together/cook things this way/follow these steps)
  • Why not? (do it differently)

I think I will stop my rambling here. I hope it helps. And I will leave you with three incredible blogs (one of them courtesy of Michael at Herbivoracious).

Playing With Fire and Water - truly spectacular molecular-influenced cooking. Ideas in Food - Wonderful. Molecular weaves in and out of what they are doing. Studiokitchen - Questions a lot of sacred cows, aims at making molecular transparent to the guest.

Answered by n/a

Monday, January 23, 2012

Is there a way to make compressed watermelon without a vacuum machine?

Question

I've got in mind to make a dish with compressed watermelon, but I don't have access to a vacuum machine. I've tried once using weight, but it just cracks because the pressure is all from one side. Thoughts? If not, can it be done with a home vacuum food-saver type device instead of a restaurant quality vacuum machine? What about denser foods such as canteloupe or cucumber?

Answer

Haven't tried it but here: http://newmountaincookery.typepad.com/a_new_mountain_cookery/2008/06/compressed-wate.html

The link suggests the following technique:

  1. Vacuum seal pieces of watermelon (if you don't have one, just put it in a ziploc bag and take out as much as the air as possible)

  2. Freeze it overnight

  3. Take it out and thaw

Wednesday, January 11, 2012

Training on molecular gastronomy and sous vide

Question

I am looking for suggestions on opportunities for learning techniques directly from a skilled professional, preferably in a classroom setting.

I have been dabbling in molecular gastronomy/precision cooking techniques in my home for a couple years. I have relied on the Khymos online reference, videos from Texturas, and a few cookbooks. Fun as this has been, I feel I am at the point where I want to have an interactive session with someone skilled in the art, but as I cannot commit to a full-time culinary education, I need to find a recreational-level course. I would be willing to travel for a well-crafted session. Does anyone have any recommendations or ideas?

Answer

I'm not sure if you've encountered this in your research but it looks like it might be full of good information.

I would personally buy this book and fully consume it, but I personally learn better that way.

José Andrés Puerta has an M.G. restaurant in your area (minibar) that appears to be more experiential. You could probably get a few good questions in during courses.

Tuesday, January 3, 2012

What is Molecular Gastronomy?

Question

There is a lot of material on TV, magazines and on the web recently about molecular gastronomy. Techniques like sous-vide and spherification seem to be popular. But what makes a cooking style "molecular gastronomy" and not "regular cooking"?

Is there a list of techiques or ingredients are a hallmark of molecular gastronomy?

Or maybe it's a philosophical distinction.

Regardless, how do I know if I'm serving "modernist cuisine"?

Answer

First of all, the term "molecular gastronomy" is almost universally derided by those who practice it and "Modernist cuisine" seems to have become the accepted nomenclature. The book Modernist Cuisine has what I regard as an excellent introduction to the movement and drawing the analogy with other Modernist movements in other artforms. The Modernist movement was about rejecting the lineage of everything that had come before and re-examining basic questions such as "what is perception". Similarly, we can trace a direct lineage from Escoffier to Nouvelle Cuisine and Modernist cuisine seeks to break that lineage.

The best way I've come up with to describe the Modernist philosophy is "the use of technology to gain direct, precise control over temperature, humidity, pressure and texture".

When you're poaching fish in a simmering stock, you want to bring the fish up to 45C by putting it in 80C stock that's heated by a 600C flame. You control point in this scenario is the knob of the stove which is the second derivative of the temperature of this fish. What's more, your feedback loop is entirely perceptual and based on human sensing and control. Modernist cuisine starts with the goal of bringing a fish up to 45C and determines the optimal way of accomplishing that goal which is sous vide. With Sous Vide, you are directly controlling the temperature of the fish and you're doing it precisely because you replace humans with automated feedback loops.

Another example might be reducing a sauce. In this case, you manipulate the vapor pressure of the liquid through the indirect application of heat. What you really want is to drive water off but you end up causing many inadvertent changes as well. With Modernist cuisine, you use a rotovap to control pressure directly and vacuum evaporate liquids without heating.

Same with using a roux or cornstarch to thicken a gravy. Instead of indirectly controlling the texture of a sauce by picking from one of the dozen common, natural thickeners, Modernist cuisine starts from asking exactly what textural qualities you want from a sauce and then figuring out the right combination of starches, hydrocolloids and proteins that accomplish that task.

Modernist cuisine may seem complicated on the surface because so much of it is new and unfamiliar but I find it actually to be radically more simple than traditional cooking once you understand this ethos. Rather than a hodgepodge of tradition built up over millennia, Modernist cooking is simply about starting first from your desired goals of flavor, temperature, pressure & texture and then figuring out the appropriate use of technology to accomplish that goal.

Wednesday, October 12, 2011

Alkaline cooking

Question

I have a (molecular) cooking recipe with instructions on introducing an agent to create an alkaline (base) environment while cooking (to influence the Maillard reaction).

What 'normal'/common ingredients can I use to create such an environment in my pan?

Answer

That is absolutely correct, an alkaline environment will speed Maillard reactions, and baking soda is a simple choice for creating it. The one thing to watch out for, depending on what you are cooking is that it can also create a mushy texture. You'll want to use a very small amount, less than 1% by weight for sure.

Friday, September 23, 2011

Creating differing temperature fluid gels that stay separate

Question

At the Fat Duck they serve a mug of hot and iced tea. The drink is served in a single cup yet the two different temperature drinks stay separate side by side with no barrier between them.

I believe this is done by using fluid gels rather than liquids but how do you actually make this. What gelling agent would you use and in what quantities? How would you actually get it into the cup maintaining separation?

Answer

This is done, and explained in the Big Fat Duck cook book, by creating a hot fluid gel and a cold fluid gel and then fitting a tight divider down the centre of the glass. Fill both sides equally, remove the divider, serve immediately.

you can follow the link and 'look inside' to see the page which has the recipe for this on to see exactly how to do it. search inside for 'hot and cold tea', then its on pages 274 and 275, so just follow those links.

The gelling agent used is gellan F, and making the gels requires making two parts for each and mixing them together. The details of the recipies are not availabale at the amazon.com site, only amazon.co.uk, although you can access it from outside the uk

Friday, September 9, 2011

Is it possible to make a marshmallow that isn't sweet?

Question

I've got in mind to make a savory play on s'mores, using morel mushroom paste where you would expect chocolate. The graham cracker replacement should be no problem. But I'm stuck on the marshmallow. If you google savory marshmallow, you basically find a bunch of standard sweet marshmallow recipes that have had some savory things added to them. I want to make one that isn't sweet at all, or only barely so, but with a recognizable marshmallow texture. Any ideas on how to approach this? I'm not asking for the recipe, just a sense of what set of ingredients and techniques have a prayer of reproducing that texture with minimal sweetness. Bonus points if it can be done using some other hydrocolloid instead of gelatin, since ultimately I need to make it vegetarian.

Answer

What about using mochi, an Asian pounded rice paste? It's a similar—though not identical—texture, it's available in sweet and savory forms, and it's held together by the starch in rice rather than anything gelatin, so it's vegetarian. You can get plain unflavored mochi at many Asian food stores; it may take some looking, as it's more often sold sweet and filled with bean paste in the US. I've had it in savory Korean dishes and I believe it's used in savory Korean dishes as well.