Folding
A gentle mixing technique used to combine light, aerated mixtures without deflating the trapped air.
Folding motion: Cut down the center, sweep the bottom, lift and fold over, repeat gently
Folding is a gentle hand-mixing technique used to combine a light, aerated ingredient (such as whipped egg whites, whipped cream, or sieved flour) into a heavier batter. The goal of folding is to achieve a uniform mixture without losing the precious air bubbles trapped in the whipped component. Unlike stirring or beating, which cut through the air pockets and deflate the batter, folding uses a sweeping, circular motion. Using a flexible silicone spatula, you cut down through the center of the bowl, sweep across the bottom, lift the batter up, and fold it over itself while rotating the bowl. This gently incorporates the ingredients, preserving the mechanical leavening necessary for light rise.
Folding is crucial in recipes that contain minimal chemical leaveners, such as soufflés, angel food cakes, sponge cakes, macarons, and chocolate mousses. It requires patience over-folding will break the egg white foam, resulting in a flat, dense, and gummy bake.
Stirring or whisking the mixture instead of folding it. Stirring pops the trapped air bubbles, deflating the egg whites and causing soufflés and sponge cakes to bake flat.
Universally standard pastry technique. Using a large, wide-bladed rubber spatula is recommended for efficient folding.
Essential for incorporating whipped egg whites or whipped cream into cake batters, mousses, soufflés, and macarons.