Can you mix baking powder and soda?

You can mix baking powder and baking soda, but it's not recommended for most recipes. Here's why:

* Different Functions: Baking powder and baking soda are both leavening agents, but they work differently. Baking powder is a double-acting leavening agent, meaning it activates when mixed with wet ingredients and again when heated. Baking soda needs an acidic ingredient to activate.

* Unpredictable Results: Mixing them together can lead to unpredictable results in your baking. The leavening action may be too strong or too weak, resulting in a dense or unevenly risen cake.

* Taste: Baking soda can leave a bitter taste if it's not properly neutralized by an acid.

When is it okay to mix them?

There are a few situations where combining baking powder and baking soda might be appropriate:

* Recipes specifically call for it: Some recipes, like certain cookies or quick breads, may specifically instruct you to use both baking powder and baking soda. These recipes are balanced to ensure proper leavening.

* When needing a boost: If a recipe calls for only baking powder but you feel it needs more rise, a small amount of baking soda might be added. However, be sure to balance it with an acidic ingredient like buttermilk or lemon juice.

In general, it's best to follow the recipe as written. If you're unsure about substituting or modifying ingredients, it's always best to consult a reliable baking resource.