Baking Powder (Best Option)
1 teaspoon per 3 eggsBaking powder is a chemical leavening agent that releases carbon dioxide gas when moistened and heated, creating bubbles that lighten the texture. In a frittata, this quick reaction is ideal since the dish cooks rapidly and does not allow time for yeast fermentation.
To use baking powder effectively, mix it thoroughly with the eggs and other ingredients just before cooking to maximize the leavening effect. Avoid overmixing to prevent deflating the bubbles.
Compared to yeast, baking powder does not add flavor complexity but ensures a tender, airy frittata with a subtle lift, which is desirable in this context.