1 cup granulated sugar
1 tablespoon cornstarch
- First in a blender add granulated sugar and cornstarch. Cornstarch is added to prevent clumping. You can use a coffee grinder or any blender such as a small smoothie blender, or a bigger aluminum blender.
- Turn the blender on and blend until the mixture is powdery. It takes only a few minutes.
- Store the homemade confectioners’ sugar in an airtight container.
A blender is better to make icing sugar than a food processor. In contrary, you can use both a food processor and a blender to make caster sugar because caster sugar is not as fine as icing sugar.