Veganbaking.net - The Hows and Whys of Vegan Baking
Veganbaking.net - The Hows and Whys of Vegan Baking
  
When you bake with baking powder and baking soda, chemical reactions start to take place as soon as they go into your batter. Your item must be put in the oven immediately so the proper chemical reactions happen under heat. Preheat your oven when you start your recipe so it can go into the oven as soon as possible.