⭐ Baking Powder (Best Nut-Free Option)
1 1/2 teaspoons per 1 cup of flourBaking powder is a chemical leavening agent composed of an acid and a base that react when moistened and heated to produce carbon dioxide gas, causing the batter to expand and rise quickly. This rapid leavening is well-suited for vanilla cakes, which are typically baked immediately after mixing.
To ensure success, use fresh baking powder and mix the batter gently to retain the gas bubbles. Avoid letting the batter sit too long before baking, as the leavening reaction starts upon mixing.
Compared to yeast, baking powder produces a lighter texture without fermentation flavors, maintaining the vanilla cake's delicate sweetness and soft crumb.