Why should I boil pretzels in baking soda water before baking?

Question

This weekend I made pretzels from Alton Brown's recipe.

This recipe, and others I've seen, call for dipping the pretzels one by one in boiling water with baking soda for 30 to 60 seconds.

I assume the boiling water will help the pretzels come up to temperature more quickly so they cook thoroughly, is this correct?

What benefit does the baking soda bring - is it important in forming a crust? If so, why?

Asked by stephennmcdonald

Answer

The pretzel originates in Germany, where it is called Laugenbrezel. It was originally cooked in a alkali solution, which is where the "Laugen" part of the word comes from; typically, lye was used, but baking soda gets you most of the way there without a trip to the pharmacy (a Mexican or Asian market may do the trick if you want culinary lye).

The alkali solution is what causes the crust to brown so deeply, and it's most of the difference between a pretzel and a bagel. A bagel would typically be boiled in a malted sugar solution instead. The flavor is also affected, but I don't know how to describe the difference; there's a very pronounced aroma difference if you skip this step. To me, you end up with nothing more than a pretty breadstick unless the dough gets that alkali bath.

If you do use culinary lye, use gloves and don't rush anything.

In Germany, the pretzel shape isn't the only option for Laugen. Little rolls calls Laugenbrötchen and longer, roughly baguette-width sticks called Laugenstangen are also popular. On my most recent trip last year, the Laugenstangen were frequently sold in the form of sandwiches, though I don't remember seeing many of those when I was first living there in the mid-90s.

Answered by JasonTrue

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