Question: what can replace 1 egg?
Answer: Vinegar & baking soda. Replace 1 egg with: 1 teaspoon baking soda, 1 tablespoon vinegar. ...  Unsweetened applesauce. Replace 1 egg with: 1/4 cup applesauce. ...  Plain or vanilla soy yogurt. Replace 1 egg with: 1/4 cup yogurt. ...  Silken tofu. ...  Ripe banana. ...  Ground flaxseed.