This recipe is from Learning to Bake Allergy-Free by Colette Martin.
Ingredients
1 t. corn starch or tapioca starch
1/2 t. baking powder
1/8 t. xanthan gum
2 Tbs. warm water
Instructions
1. Place cornstarch or tapioca starch in bowl.
2. Whisk in baking powder and xanthan gum.
3. Whisk in water.
4. Let sit 3 minutes, then add to recipe as you would add eggs.