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Per 100g
Nutrition data source: USDA FoodData Central
Common measurement equivalents in grams
Caster sugar is a source of quick energy but provides 'empty calories,' meaning it lacks essential vitamins, minerals, and fiber. While it can be part of a balanced diet in moderation, excessive consumption is linked to weight gain and dental issues.
Caster sugar contains 400 calories and 100 grams of carbohydrates per 100g serving. It contains no protein or fat, making it a pure carbohydrate sweetener.
Caster sugar is generally vegan as it is derived from sugar cane or sugar beets. However, some refined cane sugars are processed using bone char; if you are a strict vegan, look for brands certified as vegan or organic.
Yes, caster sugar is naturally gluten-free. It is made entirely from sugar cane or beets and does not contain any wheat, barley, or rye derivatives, making it safe for those with celiac disease.
Diabetics should be very cautious with caster sugar as it has a high glycemic index and causes rapid spikes in blood sugar levels. It is generally recommended to use low-glycemic sweeteners or consult a doctor regarding sugar intake.
Caster sugar has a much finer crystal size than regular granulated sugar, though it is not as fine as powdered (icing) sugar. This fine texture allows it to dissolve more quickly and easily into batters and liquids.
Yes, you can substitute them 1:1 by weight, but the texture of your baked goods may be grainier. To create a better substitute, pulse granulated sugar in a blender or food processor for a few seconds until it reaches a superfine consistency.
Caster Sugar is a versatile ingredient found in cuisines around the world. With 400 calories per 100g and valuable grams of protein, it's a nutritious addition to many dishes.
Explore more ingredients in the sweetener category with complete nutrition information.
View all sweetener →Discover 1 recipes featuring caster sugar with step-by-step instructions.
Browse recipes →Caster sugar is preferred for baking because its fine grains incorporate more air when creamed with butter, leading to a lighter, fluffier cake. It also dissolves faster in meringues and delicate sponges, preventing a gritty texture.
Store caster sugar in an airtight container in a cool, dry pantry. Because it is hygroscopic, it easily absorbs moisture from the air, which can cause it to clump or harden if not sealed properly.
Caster sugar has an indefinite shelf life because it does not support the growth of bacteria. However, for the best quality and to ensure it hasn't absorbed any kitchen odors, it is best used within two years of opening.