I have a cookie formula that calls for baking ammonia. What are the proportions to replace the baking ammonia with baking soda or baking powder. I know that baking powder is a mixture of soda and Cream of tartar. I will appreciate your help.

--Ted

Baking ammonia, also known as ammonium bicarbonate, is a white powder or crystal that was used for leavening baed good prior to the creation of modern baking powder.  I wrote an article about it a few years ago -- What is Baking Ammonia.  It can be found in some drug and specialty food store.

Because baking ammonia breaks down with heat to leaven foods, its action is somewhat similar to most commercial double-acting baking powders.

If you can't find baking ammonia, you can substitute the same amount of commercial baking powder.