Also known as superfine sugar, castor sugar, baker's sugar.
The best replacements and alternatives for caster sugar — 2 tested substitutions with exact ratios and the science behind each swap.
Use 1:1 by weight for the closest replacement in most recipes.
View adjustment notes →1:1 by weight
Pick substitutes that preserve tenderness, aeration, and even rise in cake batters.
1:1 by weight
Find substitutions that keep spread, chew, and browning close to your original cookie recipe.
1:1 by weight
Use forgiving substitutions that still maintain moisture and lift in quick batters.
1:1 by weight
Choose alternatives that hold batter consistency and help keep a light interior.
1:1 by weight
Prioritize substitutions that protect gluten development and fermentation performance.
These are common questions bakers ask. Each links to a recipe-specific substitute page with direct ratios and adjustment notes.
Granulated Sugar at 1:1 by weight is the closest match — Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal. If that is unavailable, Powdered Sugar (Icing Sugar) (1:1 by weight, only where sugar fully dissolves).
See recipe-specific answer →Yes. Start with Granulated Sugar at 1:1 by weight. Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal.
See recipe-specific answer →Granulated Sugar, used at 1:1 by weight. Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal.
See recipe-specific answer →Use Granulated Sugar at 1:1 by weight — Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal. Mix as the original recipe directs, then taste and adjust liquid or bake time in small steps after a test batch.
See recipe-specific answer →Yes, at 1:1 by weight. Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal. Bake-test before scaling up.
See recipe-specific answer →If a recipe calls for 1 cup caster sugar (190g), start with your selected substitute's ratio, then run a small test bake before scaling.
Expect up to 8% variation in cup-based measurements due to brand and handling differences. Weight-first measuring is more reliable for structure-sensitive recipes.
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Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal.
Chemically identical sucrose; only crystal size differs. Coarser crystals dissolve slower, which can leave speckled meringue and slightly coarser crumb.
Contains about 3% cornstarch — fine in icings and some doughs, wrong for creaming or meringue.
Particles are too fine to cut air pockets into butter during creaming, and the added starch changes texture in high-sugar recipes.
Substitutions work best in forgiving recipes like muffins, quick breads, and cookies. They're riskier in precision-dependent recipes like macarons, choux pastry, or laminated doughs where the original ingredient's exact properties (fat content, water content, acidity) are critical to the chemistry.