- Blitz granulated sugar in a food processor or blender for 15–30 secondsStop when the crystals are noticeably finer but well before they turn powdery. Caster sugar dissolves faster than granulated — useful in meringues, fine cakes, and cold drinks.
Caster sugar substitutes
Tested swaps for caster sugar, with ratios and sources.
Measure substitutes by weight where you can. The Caster sugar converter gives the grams.
Note: our substitutions are direct, not chained — we don't recommend substituting a substitute.