Hi PJ! I love making chocolate chip cookies I've always used alton brown's recipe found here: http://www.foodnetwork.com/recipes/alton-brown/the-puffy-recipe/index.html my question is in alton's recipe it only use baking powder. how come in other recipe and in your recipe it also called for baking soda. what does baking soda do for CC cookies? Hi - Use of baking vs. baking powder depends on the level of acidity of the other ingredients in the recipe. Generally, if there's a higher percentage of brown sugar or some other acid ingredient, baking soda can be called for. - PJH

• Reply