You're checking the recipe for meringues and notice it calls for caster sugar-but your pantry only has regular granulated sugar.
Caster sugar's fine crystals dissolve faster than standard table sugar, which matters in meringues, sponge cakes, and creamed butter mixtures.
The fine texture affects how quickly sweetness integrates into batters and frostings. Standard granulated sugar doesn't behave the same way in delicate applications.
Superfine sugar matches caster sugar 1:1 in all baking applications. DIY pulsed granulated sugar (processed briefly in a food processor) replicates the fine texture for most recipes. Powdered sugar works in icings and frostings but contains cornstarch that changes texture in other baked goods.
7 Alternatives to Replace Caster Sugar
Caster sugar's fine grain dissolves quickly in batters and whipped mixtures. The swaps below range from identical matches to options that require minor adjustments.
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| # | Substitute | Best For | Ratio | Key Note |
|---|---|---|---|---|
| 1 | Superfine Sugar | ✨ Both | 1:1 | Identical grain size |
| 2 | DIY Finer Granulated | 🥧 Baking | 1:1 | Pulse 30 seconds |
| 3 | Powdered Sugar | 🥧 Baking | 1:1 | Contains cornstarch |
| 4 | Light Brown Sugar | 🥧 Baking | 1:1 | Adds molasses flavor |
| 5 | Honey | 🍳 Cooking | ¾ cup | Reduce liquid by ¼ cup |
| 6 | Maple Syrup | 🍳 Cooking | ¾ cup | Strong maple taste |
| 7 | Coconut Sugar | 🌱 Vegan | 1:1 | Coarser grain |
1. Superfine Sugar 🏆
Superfine sugar is just another name for caster sugar in North America. The grain size matches exactly, so it dissolves as quickly in batters, meringues, and cold mixtures.
Use it 1:1 anywhere a recipe specifies caster sugar. No adjustments needed.
It works identically in creamed butter mixtures, whipped egg whites, and shortbread cookies. The clean sweet taste remains neutral.
2. DIY Finer Granulated Sugar 🔄
Pulse regular granulated sugar in a food processor for 30 seconds to break down the crystals. The result mimics caster sugar's fine texture closely enough for most baking.
Use 1:1 in cakes, cookies, and whipped cream. Let the processor run just long enough to create a finer grain-don't turn it into powder.
- ✅ Works in most baking recipes
- ✅ Ready in under a minute
- ⚠️ Less uniform than store-bought superfine
- ⚠️ Can clump if processed too long
Stop the processor before the sugar turns into confectioners' sugar. A quick pulse creates the right texture.
3. Powdered Sugar 🧁
Powdered sugar (confectioners' sugar) dissolves instantly because the crystals are ground to a powder. It includes cornstarch as an anti-caking agent, which changes texture in some recipes.
Use 1 cup sifted powdered sugar per 1 cup caster sugar in frostings, icings, and delicate pastries. Sifting removes lumps.
- ✅ Dissolves faster than caster sugar
- ✅ Works great in icings
- ⚠️ Cornstarch alters texture in cookies and cakes
Skip it for creaming with butter-the powdery texture doesn't incorporate air the same way. Stick to applications where smoothness matters more than structure.
4. Light Brown Sugar 🍪
Light brown sugar brings moisture and molasses flavor along with sweetness. It creams well with butter but changes the final taste and color of baked goods.
Use 1:1 in cookies, quick breads, and brownies where caramel notes fit the flavor. The extra moisture makes denser, chewier textures.
- 🍪 In cookies: Creates chewier texture and deeper color
- 🎂 In cakes: Adds caramel undertone that suits spice cakes and coffee cakes
Avoid it in meringues, macarons, or light-flavored cakes-the molasses taste and darker color don't suit delicate desserts. If you run low, tested Brown Sugar replacements cover similar ground.
5. Honey 🍯
Honey adds liquid sweetness with floral notes. It changes moisture balance in recipes, so you'll need to reduce other liquids to compensate.
Use ¾ cup honey per 1 cup caster sugar and reduce other liquids by ¼ cup. Honey works best in glazes, sauces, marinades, and dressings where liquid sweetness fits naturally.
Skip it in recipes that rely on dry sugar crystals for structure-meringues, angel food cakes, and creamed butter mixtures won't work. The floral flavor shows up strongly in baked goods.
6. Maple Syrup 🍁
Maple syrup brings woody sweetness and liquid moisture. The flavor impacts the final dish more than neutral sugars do.
Use ¾ cup maple syrup per 1 cup caster sugar and cut other liquids by 3 tablespoons. It works in pancakes, waffles, sauces, and marinades.
- 🥞 For breakfast: Natural fit in pancakes and French toast
- 🍖 In marinades: Adds sweetness and caramelizes well on grilled meats
- ⚠️ Skip in delicate desserts: Maple flavor overpowers vanilla cakes and custards
- ⚠️ Not for meringues: Liquid form prevents proper whipping
The distinct taste makes it a poor match for recipes where clean sweetness matters. If maple isn't the right profile, common Maple Syrup swaps ranked offer other liquid sweetener options.
7. Coconut Sugar 🥥
Coconut sugar comes from coconut palm sap. It has a coarser grain than caster sugar and brings mild caramel and nutty notes.
Use 1:1 in recipes where brown sugar-style flavor works-think spice cakes, oatmeal cookies, and coffee cake. The texture stays slightly grainy even after mixing.
Avoid it in meringues and recipes requiring fine, fast-dissolving crystals. The lower sweetness level means you might taste less sugar overall.
Picking Your Caster Sugar Swap
- For meringues and macarons: Superfine sugar or DIY pulsed granulated-both dissolve fast without adding flavor
- For creaming with butter: Superfine sugar or light brown sugar if caramel flavor works
- For frostings: Powdered sugar creates the smoothest texture
- For glazes and sauces: Honey or maple syrup add liquid sweetness
Frequently Asked Questions
Yes, but the coarser crystals take longer to dissolve. It works fine in most cakes and cookies where mixing time is sufficient. For meringues, whipped cream, or recipes with minimal mixing, pulse the granulated sugar in a food processor for 30 seconds to create a finer texture.
No. Caster sugar has fine granulated crystals, while powdered sugar is ground to a powder and contains cornstarch. Caster sugar dissolves quickly but maintains some grain, which helps with creaming butter and building structure in baked goods. Powdered sugar dissolves instantly but the cornstarch changes texture in cakes and cookies.
They're the same product with different regional names. "Caster sugar" is used in the UK and Australia, while "superfine sugar" is the North American term. Both refer to granulated sugar with a finer crystal size than regular table sugar.
Yes, at a 1:1 ratio, but it changes the flavor and texture. Light brown sugar adds molasses taste and extra moisture, creating chewier cookies and darker-colored cakes. It works well in recipes where caramel notes fit-like chocolate chip cookies, spice cakes, and brownies. Skip it in delicate desserts like meringues, macarons, or vanilla sponge cakes where the molasses flavor stands out.
The fine crystals dissolve faster in whipped egg whites without weighing down the foam. Regular granulated sugar takes longer to dissolve and can create a grainy texture. Coarser crystals also risk deflating the meringue before the sugar fully incorporates.
7 Best Substitutes for Caster Sugar
Ingredients
Method
- Choose a substitute based on your recipe needs-superfine sugar or DIY finer granulated for baking, powdered sugar for frostings, and liquid sweeteners for sauces or glazes.
- If using granulated sugar as a substitute, pulse it in a food processor for about 30 seconds to achieve a finer texture.
- Apply the substitution ratios as specified, adjusting liquid ingredients when liquid sweeteners like honey or maple syrup are used.
- Check the final mixture for taste and consistency, especially when using alternatives that add flavor or moisture.
Notes
- Superfine sugar and pulsed granulated sugar dissolve quickly without altering flavor.
- Powdered sugar contains cornstarch which may affect texture in baked goods.
- Liquid sweeteners require reducing other liquids to maintain proper moisture balance.
