5 Best Custard Powder Substitutes (with Ratios)

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Quick ratios for custard powder substitutes (store-bought and DIY) so you can thicken custard, pudding, and pie fillings with minimal trial-and-error.

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Prep Time 5

Cook Time 0

Total Time 5

Servings: 1 batch

Course: Substitutes

Ingredients Equipment Method Notes

Ingredients

Best Matches

1:1 Vanilla instant pudding mix Closest flavor profile; use in cooked or no-bake pudding styles—stir in off-heat then chill if your recipe calls for setting.
1:1 DIY custard powder (cornstarch + sugar + vanilla) Matches classic thick custard texture; add a little extra vanilla if your custard powder was strongly flavored.

Good Alternatives

1 tbsp:1 yolk Egg yolks (tempered into warm milk) Richer, less “powdery” set; cook gently and stop when coats a spoon (avoid boiling to prevent curdling).
1:1 Cornstarch + milk powder (richer DIY) Adds dairy body for a fuller custard taste; useful when your recipe relies on richness, not just thickness.

Emergency Swaps

1:1 Tapioca starch + vanilla (glossy set) Gives a glossy, slightly stretchy set; best when you want a smooth pudding-style texture.
1:1 Arrowroot powder (silky thickening) More delicate texture; tends to break down less under gentle heat, so it works for soft custards.

Equipment

Whisk
Saucepan
Measuring spoons
fine-mesh strainer (optional, for extra-smooth custard)

Method

Identify your dish goal (sliceable filling vs creamy spoonable custard) and pick the closest substitute from the table.
Use the listed ratio for each tablespoon/amount of custard powder in your recipe.
Whisk the substitute into cold milk (or temper egg yolks with warm milk) to prevent lumps.
Heat gently while stirring until thick enough to coat a spoon; if using egg yolks, stop before simmering.
Taste and adjust sweetness/vanilla, then cool or chill according to your recipe’s setting method.

Notes

For thickening: cook until glossy and spoon-coating; for a set dessert: chill to firm further.
If your custard powder is flavored (vanilla vs other): add the matching flavor extract/paste to your substitute.

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