I bought the Alton Brown book "I'M JUST HERE FOR MORE FOOD" food x mixing x heat=baking.
This explains all the mechanics of what each ingredient and what they do or do not do.
It has been extremely helpful to me.
If you know the basics behind why you use eggs or baking powder instead of baking soda you can learn to build your own recipes from scratch and then it's only your imagination that holds you!
