What ingredient is the foundation of quick breads?

Here's why:

* Leavening Agent: Baking powder is a chemical leavening agent that produces carbon dioxide bubbles when mixed with liquid, causing the batter to rise. This is what gives quick breads their light and airy texture.

* No Yeast: Unlike traditional breads that rely on yeast for leavening, quick breads use baking powder for instant rising.

* Quick Preparation: The name "quick bread" comes from the fact that these breads can be made quickly, as they don't require time for dough to rise.

While other ingredients like flour, eggs, and milk are also crucial, baking powder is the key ingredient that makes quick breads possible.