Final answer:
Superfine or caster sugar can be used to whip egg whites, as it dissolves faster than regular sugar and helps stabilize the whipped egg whites' foam, making it ideal for meringues and mousses.
Step-by-step explanation:
Superfine or caster sugar can indeed be used for whipping egg whites, and the correct answer to the question is a) Yes. Caster sugar is a sweetener for drinks and cooking that has a fine texture, which dissolves more quickly than regular granulated sugar, making it an ideal option for meringues and mousses. This is because finer grains of sugar will more easily integrate with the proteins in the egg whites, helping to stabilize the foam that is produced during whipping.
In baking and dessert-making, caster sugar can be especially helpful when creating recipes that require a delicate structure and texture. The role of sugar in whipping egg whites is not only to sweeten the mixture but also to contribute to the formation of a stable and glossy meringue. Therefore, using superfine sugar can result in a smoother and more stable end product when whipping egg whites.