2.Place the egg whites in a large, very clean, dry stainless steel or glass bowl-any hint of grease will prevent the egg whites foaming. Leave the whites for a few minutes to reach room temperature, then, using electric beaters, beat slowly until the whites start to become a frothy foam, then increase the speed until the bubbles in the foam have become small and evenly-sized. When the foam forms stiff peaks, and the sugar gradually, beating constantly after each addition, until the mixture is thick and glossy and all the sugar has dissolved. Don't overbeat or the mixture will become grainy.