Substitute for white-sugar in frosting
Quick answer
Powdered sugar (confectioners' sugar) is the standard swap for most frostings — it dissolves instantly and produces a smooth, spreadable texture without a gritty finish. Use 1 3/4 cups powdered sugar for every 1 cup white sugar called for, but note this works best in buttercream-style frostings, not cooked sugar applications like Italian meringue.
Some links below are affiliate links. As an Amazon Associate, AltPantry earns from qualifying purchases at no extra cost to you.
| Rank | Substitute | Ratio (replaces 1 cup white-sugar) | Notes |
|---|---|---|---|
| #1 | Powdered sugar (confectioners' sugar) | 1 3/4 cups powdered sugar per 1 cup white sugar | Powdered sugar is already the standard ingredient in American buttercream and most no-cook frostings, so this is less a substitute than a format correction. It dissolves completely at room temperature, eliminating any gritty texture. The cornstarch in commercial powdered sugar (about 3%) slightly stabilizes the frosting. Do not use this swap in cooked frostings like Swiss or Italian meringue buttercream — those require granulated sugar to dissolve in hot liquid or syrup. |
| #2 | Caster sugar (superfine sugar) | 1 cup caster sugar per 1 cup white sugar | Caster sugar has a much finer grain than standard granulated, so it dissolves faster and more fully when creamed with butter. It won't fully replicate the silky finish of powdered sugar in no-cook buttercreams, but it works acceptably in cooked frostings and ermine (flour-based) buttercream where sugar dissolves during cooking. Expect a slightly less smooth result in uncooked recipes compared to powdered sugar. |
| #3 | Honey | 3/4 cup honey per 1 cup white sugar; reduce other liquids by 1–2 tbsp | Honey works in small-batch cream cheese frostings and whipped frostings where a looser texture is acceptable. It adds noticeable floral flavor and a slight tan color. Honey is hygroscopic, so frosting made with it will soften and weep in humid conditions or after more than a few hours at room temperature. Not suitable for stiff decorating frostings or piped flowers — the result won't hold its shape. |
| #4 | Maple syrup | 3/4 cup maple syrup per 1 cup white sugar; reduce other liquids by 1–2 tbsp | Works in a pinch for casual cream cheese or whipped cream frostings where mild maple flavor is welcome. Produces a soft, slightly loose frosting that doesn't pipe cleanly. Grade A dark maple syrup has the most noticeable flavor impact. Like honey, it will weep over time. Not recommended for wedding cakes, tiered cakes, or anything requiring structural stability. |
Why frosting is different
In most baked goods, sugar dissolves during cooking. In frosting, it often doesn't — undissolved granulated sugar produces a gritty, sandy texture that doesn't smooth out. The physical form of sugar matters more in frosting than in nearly any other application. Additionally, many frosting recipes are already calibrated around powdered sugar, so substituting granulated sugar in those recipes introduces a texture problem from the start rather than solving one.
Common mistakes
The most common error is swapping granulated white sugar 1:1 into a no-cook buttercream recipe that specifies powdered sugar — the result is gritty and the sugar won't fully incorporate no matter how long you beat it. A close second is using liquid sweeteners like honey or maple syrup without reducing other liquids, which produces frosting too loose to spread or pipe. Finally, people often use too much powdered sugar when converting by weight rather than volume — powdered sugar is lighter per cup, so volume conversion (1 cup granulated ≈ 1 3/4 cups powdered) gives more accurate results than a 1:1 weight swap in most home recipes.
In frosting, the physical state of sugar at room temperature is everything. Granulated white sugar that hasn’t been dissolved in heat or liquid remains as discrete crystals in the fat matrix, which the palate registers immediately as grittiness — no amount of additional beating fixes this. Powdered sugar sidesteps the problem entirely because its particles are fine enough to disperse fully into butter or cream cheese without any heat.
For cooked frostings — Swiss meringue buttercream, Italian meringue buttercream, or caramel-based frostings — granulated white sugar is actually required, since it dissolves into a hot syrup or egg whites over heat. In those contexts, the substitution question reverses: you’d need to convert powdered sugar back to granulated, not the other way around. Know which type of frosting you’re making before swapping anything.
Frequently asked questions
- Can I use granulated white sugar to make American buttercream?
- Not directly. Standard granulated sugar won't dissolve in room-temperature butter, leaving a gritty frosting. You'd need to first make a fine sugar syrup and let it cool, which changes the recipe significantly. Use powdered sugar instead.
- Will substituting honey or maple syrup affect how long the frosting stays stable?
- Yes. Both are liquid sweeteners and are hygroscopic, meaning they attract moisture. Frosting made with either will soften faster, won't hold piped shapes, and may weep if left out more than 2–3 hours. They're best suited for frostings that will be served quickly or kept refrigerated.
- Does coconut sugar work as a substitute for white sugar in frosting?
- Coconut sugar dissolves poorly at room temperature and adds a strong caramel-molasses flavor and dark brown color. It's not a reliable substitute for frosting — the texture and appearance are significantly different from what most recipes intend. It's omitted from this page for that reason.
← Back to all white-sugar substitutes