Substitutions

What can I use instead of powdered sugar?

Granulated sugar milled to a fine powder and cut with a few percent of cornstarch to stop it caking. It dissolves instantly and sets firm.

What it does in a recipe: Sweetness that dissolves without grit, plus the starch and body that let icings, glazes and buttercreams hold a set. Pick the swap that covers that job — the ratios below are written so you can act on them without doing any arithmetic.

Also called: Confectioners' sugar, Icing sugar, 10X sugar

4substitutes

2close matches

Sweetenerscategory

Quick answer

Granulated sugar + cornstarch, blitzed

1 cup powdered sugar = 1 cup granulated sugar + 1 tsp cornstarch

All substitutes, best first

4 ways to replace powdered sugar

Granulated sugar + cornstarch, blitzed

Closest match

1 cup powdered sugar = 1 cup granulated sugar + 1 tsp cornstarch

Milling the crystals fine reproduces the texture, and the cornstarch does the same anti-caking and thickening job it does in the commercial product.

MethodBlend in a dry high-speed blender or spice grinder for 30-60 seconds until it looks like flour, then let the dust settle for a minute before opening the lid. Sift before using in icing.

Trade-offA home blender leaves it fractionally coarser than store-bought, which can show as a very slight grain in a thin glaze. Buttercreams hide it completely.

BakingRaw / no-cookSaucesVeganVegetarianGluten-freeDairy-freeEgg-freeNut-freeSoy-freeAlcohol-free

Caster sugar + cornstarch, blitzed

Closest match

1 cup powdered sugar = 1 cup caster sugar + 1 tsp cornstarch

Caster sugar starts finer than granulated, so the grinder has less work to do and the result comes out smoother.

MethodGrind 30 seconds, rest, then sift. Sifting matters more than grinding time for a glassy glaze.

Trade-offThe closest match you can make at home. Nothing meaningful is lost.

BakingRaw / no-cookSaucesVeganVegetarianGluten-freeDairy-freeEgg-freeNut-freeSoy-freeAlcohol-free

Granulated sugar + arrowroot, blitzed

Reliable

1 cup powdered sugar = 1 cup granulated sugar + 1 tsp arrowroot powder

Arrowroot is a corn-free starch with similar fine particle size, so it keeps the powder free-flowing and lightly thickens an icing the same way.

MethodBlend 30-60 seconds and sift. Use it the same day — arrowroot draws moisture faster than cornstarch and the mix can clump in storage.

Trade-offSets very slightly softer than a cornstarch version, which is only noticeable on a glaze you want rock-firm.

BakingRaw / no-cookSaucesVeganVegetarianGluten-freeDairy-freeEgg-freeNut-freeSoy-freeAlcohol-free

Allergen checkThis is the version to reach for when corn is the problem, but arrowroot is often packed on shared equipment with other starches and flours. Read the packet, and for a diagnosed corn allergy confirm the brand with the manufacturer rather than assuming.

Coconut sugar, blitzed with cornstarch

In a pinch

1 cup powdered sugar = 1 cup coconut sugar + 1 tsp cornstarch, ground fine

It grinds to a comparable powder and sweetens at roughly the same rate, so it works where a glaze is going to be dark anyway.

Trade-offGrinds to a tan powder, never white, so it rules out any icing where colour matters. It also stays slightly grittier than cane sugar.

BakingRaw / no-cookVeganVegetarianGluten-freeDairy-freeEgg-freeSoy-freeAlcohol-free

Allergen checkUS labelling classifies coconut as a tree nut even though this is a sap sugar, so packs may carry a tree-nut advisory. Check every bag, and treat a diagnosed allergy as a question for a clinician, not a recipe note.

Worth knowing

The cornstarch is not filler — it is what keeps royal icing and buttercream from weeping. If you grind your own and leave it out, expect glazes to stay tacky longer.

At a glance

Powdered sugar in summary

Category	Sweeteners
Job in a recipe	Sweetness that dissolves without grit, plus the starch and body that let icings, glazes and buttercreams hold a set
Suits	Vegan, Vegetarian, Gluten-free, Dairy-free, Egg-free, Nut-free, Soy-free, Alcohol-free
Swaps available for	Alcohol-free Dairy-free Egg-free Gluten-free Nut-free Soy-free Vegan Vegetarian
Number of substitutes	4

More sweeteners

Agave nectar4 substitutes Barley malt syrup4 substitutes Caster sugar4 substitutes Coconut sugar4 substitutes Dark brown sugar4 substitutes Date syrup4 substitutes

Cooking around an allergy? Diet tags here describe the ingredient itself, not any particular brand. Processed products change formulation without notice and shared production lines are common, so read the label on everything you use. A severe allergy is a medical matter — confirm with the manufacturer or your clinician rather than relying on a substitution chart.