Caster Sugar (Best Option)
1:1 by volume (e.g., 1 tablespoon caster sugar per 1 tablespoon granulated sugar)Caster sugar is essentially finely ground granulated sugar, which allows it to dissolve more readily in the cream and milk mixture used in panna cotta. This quick dissolution prevents any graininess and ensures a uniform sweetness throughout the dessert.
When using caster sugar, ensure it is fully incorporated by gently warming the mixture if needed, but avoid overheating to maintain the cream’s delicate flavor. Stirring well helps achieve a smooth consistency.
Compared to granulated sugar, caster sugar yields a panna cotta with a silkier mouthfeel and no residual sugar crystals, preserving the classic creamy texture and subtle sweetness expected in this dessert.