Separate the egg yolk from the egg whites using chilled eggs.
Let the egg whites sit at room temperature for 10 to 15 minutes.
Optional: Add cream of tartar, lemon juice, or white vinegar before beating.
Beat the egg whites on medium-low speed, then increase to medium speed until soft peaks form.
Gradually add sugar, about a tablespoon at a time, while continuing to beat.
Ensure the sugar is fully dissolved by testing the mixture for grittiness.
