Folding

Folding is a gentle mixing technique used to combine a light, aerated mixture with a heavier base while preserving as much incorporated air as possible. It is essential in preparations such as soufflés, mousses, génoise, sponge cakes and some batters where volume depends on trapped air.

How to fold ingredients

1. Add a small portion of the light mixture to the heavier base and stir it in to loosen the base if the recipe calls for it.
2. Use a flexible spatula to cut down through the centre of the mixture.
3. Sweep the spatula along the bottom of the bowl and lift the mixture up and over the top.
4. Rotate the bowl and repeat, stopping as soon as the ingredients are evenly combined.

When folding is used

• Soufflés: incorporate whipped egg whites into the flavoured base without losing too much volume.
• Mousses: combine whipped cream or meringue with a chocolate, fruit or custard base.
• Génoise and sponge cakes: incorporate flour or other dry ingredients into a whipped egg foam.
• Delicate batters: combine ingredients while limiting gluten development and preserving aeration.

Folding versus stirring and beating

Stirring and beating are more vigorous and are appropriate when ingredients need thorough mixing or when a structure must be developed. Folding uses controlled, sweeping movements to minimize deflation. It is not simply slow stirring; the movement lifts and turns the mixture through itself.

Chef’s tip: Do not chase every small streak with excessive mixing. Scrape the bottom and sides of the bowl, rotate it consistently and stop once the mixture is sufficiently uniform for the recipe.

Key distinction: Folding combines ingredients while protecting air and volume; beating is used when vigorous mixing or aeration is required.