Store superfine sugar in a cool, dry place.
Use superfine sugar as you would conventional granulated sugar. It works particularly well for making meringue and other applications where the sugar must dissolve in cold/lukewarm substances. Superfine sugar can also be dissolved in hot or cold drinks and used to make simple syrup to sweeten drinks, sorbets, or cakes.
Though its crystals are slightly larger, superfine sugar can often be used as a substitute for castor/caster sugar.
Sugar Recipes & Techniques