How to beat egg whites: Beat egg whites vigorously with a wire whisk in a quick looping motion. Sugar helps stabilize the foam. Add sugar gradually. Soft peaks stage: Peaks barely holds shape and tip droops or flops over. Firm peaks stage:Glossy, firm and smooth. Peaks form with a slight curl at tip and keep its shape. Stiff peaks stage: Glossy and very stiff. Peaks form and hold its shape even when whisk or bowl is turned. Check out this recipe: https://homefoodie.com/recipe/home-foodie-souffle