white sugar with very small grains, often used in cooking
Sprinkle a teaspoon of caster sugar over the top.
Cream together the butter and caster sugar.
The recipe called for caster sugar to ensure a smooth texture in the dessert.
She measured out the precise amount of caster sugar needed for the cake, emphasizing the importance of accuracy in baking.
The pastry chef sifted the caster sugar to remove any lumps before incorporating it into the delicate frosting.
If you don't have caster sugar, you can create a substitute by grinding regular sugar in a blender until it reaches a finer consistency.
