How to get raspberry flavor into a smoothie without seeds?

Question

I often enjoy (when it's not dead of winter) a fruit smoothie for breakfast; generally I use orange juice or some other juice flavor (V8 has a few with fruit flavors masking veggie tastes that I sometimes use), yogurt, and fruit I've frozen myself (removes the need for ice, leading to a thicker smoothie). Typically I use strawberries and bananas; however, when I purchase smoothies, my favorite flavors involve raspberry. I've tried purchasing frozen berries and tossing some in, but the seeds irritate me to no end.

How can I get the taste of raspberries, preferably from raspberries themselves rather than extract (seems healthier), but not the seeds?

Answer

I'd stew the raspberries down with a little water (and sugar if the raspberries aren't sweet) until they're very soft, then pass the whole thing through a sieve to remove the seeds. You can then either store the result in the fridge, or pour it into an ice cube tray for easy portioning and a nice cold smoothie.

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