http://shmooedfood.blogspot.com/2006/01/fluffy-white-cupcakes.html
I've used this as a small two layer cake at my son's b-day. I've made banana muffins with it. You can do a lot to this recipe. Though I would not use so much vanilla. I also use regular milk.
Have fun!
PS..my son also has a lot of food allergies or sensitivities. Also, Peanuts so that is a major bummer when trying to find any good mixes.