These are copycat recipes and not the actual propriety recipe that is property of Starbucks. The are approximations. For the real thing, visit your local Starbucks.
Recipe by Lora Brody, author of 22 cookbooks including Basic Baking published by William Morrow. Lora developed this recipe to rival the $2.50 versions at Starbucks saying "you can make them too and for less that $2.50 each!".