Using Granulated Sugar Instead of Caster Sugar
Ratio
1:1 by weight
Excellent — nearly identical results
Recipe Adjustment Notes
Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal.
The Science Behind This Swap
Chemically identical sucrose; only crystal size differs. Coarser crystals dissolve slower, which can leave speckled meringue and slightly coarser crumb.
Measurement Variance Note
For 1 cup references, this ingredient can vary by about 8% across brands and measuring methods (175g-205g per cup). For the most reliable substitution result, measure by weight and test a half batch first.
How Granulated Sugar Compares for Caster Sugar
Quality rating: excellent. Works in almost everything. For meringues and delicate sponges, blitz granulated in a blender for 10-15 seconds first to approximate the finer crystal.