Types of sugar: 9 kinds and exactly how they change your bakes

Ground finer, at about 0.15 to 0.25mm, caster sugar dissolves almost instantly. That matters in egg whites, where it melts in before the proteins tighten, helping prevent gritty, weeping meringues and collapsed soufflés. It also blends smoothly into cold drinks and delicate shortbread. Because it is so fine, it packs densely, so weigh it rather than scooping by the cup. In a pinch, whizz granulated sugar in a blender for a few seconds.

Confectioners’ sugar, or icing sugar, is pulverised sucrose blended with a little cornstarch, usually 3 to 5 per cent, to stop clumping. Its fine texture cannot cream air into butter, so it will not lift a sponge. What it does beautifully is help keep crumb tender in shortbread and give glazes and frostings a smooth, non-gritty finish. Sift this type of sugar before using, and save it for icings, dusting and melt-in-the-mouth biscuits.

Coated with roughly 3.5 per cent molasses, light brown sugar brings gentle caramel notes and extra moisture. Its invert sugars hold on to water as bakes cool, which is why cookies stay chewy, while its mild acidity helps activate baking soda. Expect a softer, slightly thicker cookie than one made with white sugar. Store it airtight, as it hardens quickly when it dries out, and pack it firmly into the cup when measuring.

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With about 6.5 to 8 per cent molasses, double that of its lighter sibling, dark brown sugar delivers a deeper toffee flavour and keeps bakes soft for longer. It browns faster and can encourage more spread, so watch cookies near the end of baking. Light and dark brown can usually be swapped one for one by weight, so reach for dark in gingerbread, spice cakes and rich chocolate bakes.

Muscovado is a dark, damp, unrefined cane sugar that keeps its natural molasses, giving it a sticky texture and a bittersweet, almost smoky flavour. Its moisture and minerals mean this type of sugar needs watching in a hot oven, as it can scorch faster than white sugar. Sieve it first to remove lumps. It shines in sticky toffee pudding, fruitcake, barbecue marinades and glazes, but can overpower delicate flavours.

Turbinado, like its close cousin Demerara, is a partly refined cane sugar with large, dry, amber grains and a light toffee note. Because the crystals resist dissolving in surface moisture, they stay crunchy rather than melting into the batter. Sprinkle them over muffins, scones and pie crusts before baking, or use them for a brûlée top. They are less suited to cold batters, where the grains stay gritty.

These chunks of compressed beet sugar are built to survive heat. Folded into yeasted Liège waffle dough, they hold their shape inside the batter, then caramelise against the hot iron into crackling, golden pockets. Smaller Swedish pearl sugar will simply dissolve here, so do not swap it in. Belgian pearls are too coarse for ordinary baking, but they are essential for authentic waffles and cramique.

Honey is rich in fructose, which begins to caramelise at much lower temperatures than sucrose, so it browns and burns faster. When replacing a cup of granulated sugar, use about three-quarters of a cup, cut other liquid by three to four tablespoons, add a quarter teaspoon of baking soda and lower the oven by 15°C. Expect moist, floral bakes that stay soft for days.

Once you know what each sugar does, baking becomes less about luck and more about choice. Match the crystal to the job, adjust for moisture and watch the heat, and most bakes that once failed will start to behave. Keep a few of these in your pantry and experiment with confidence.

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