Acorn Flour substitute

Best substitute

Chestnut Flour

Use the same amount for up to about half the flour in a recipe as the acorn flour you are replacing

Best for pancakes

Close match

First work out which product your recipe actually wants, because two different things get called acorn flour. For baking, chestnut flour is the closest substitute at 1:1 and buckwheat flour is the next best, both sharing acorn's earthy tan character and gluten-free crumb. For Korean dotorimuk, the wobbling acorn jelly, you need acorn starch rather than acorn flour, and there is no true substitute: mung bean starch or buckwheat starch at 1:1 will set into a perfectly good jelly, but you will be making nokdumuk or memilmuk instead, cleaner and more slippery with none of the acorn bitterness. Do not use cornstarch or potato starch for muk, because they set gummy and weep.

Other acorn flour substitutes

Ranked, with the exact amount to use

2Buckwheat Flour
Close match
Use the same amount for up to about half the flour
Hits the right register of earthy, slightly bitter and mineral, which is what makes acorn flour interesting rather than just nutty.
What changes
Similar greyish-tan colour too.
Best for
pancakes, crepes, noodles, flatbreads, quick breads
More assertive and slightly sour-edged than acorn, and unmistakably buckwheat to anyone who knows the flavour. It is also far cheaper and stocked everywhere, which makes it the practical answer for most people. Note buckwheat is a common allergen in some regions.
3Almond Flour or Hazelnut Flour
Taste and texture differ
Use the same amount for up to about a third of the flour
Matches acorn flour's fat content and nutty character, which most gluten-free flours do not, and gives a tender rich crumb.
What changes
Best for
cookies, cakes, muffins, shortbread, crumbles
Neither contains starch, so the crumb comes out denser, damper and more fragile than with acorn flour, and there is no bitterness at all. Pair it with a spoonful of rice flour or tapioca starch to restore some structure.
4Mung Bean Starch, For Muk Only
Different taste
Use the same amount
The honest answer for Korean acorn jelly.
What changes
Mung bean starch sets into nokdumuk, a traditional dish in its own right, with the same tender wobble and the same slippery bite.
Best for
dotorimuk-style jelly, muk salad, cold summer dishes
The jelly comes out pale ivory instead of brown, and tastes clean and neutral where dotorimuk is nuttily bitter. Be clear with yourself that you are cooking a different dish rather than substituting successfully. Cooking method and ratios are the same.
5Buckwheat Starch, For Muk Only
Close match
Use the same amount
Another genuinely traditional muk, memilmuk, and the closest in flavour to dotorimuk because buckwheat carries its own earthy bitterness.
What changes
Best for
dotorimuk-style jelly, muk salad, cold noodle-style dishes
Greyer than acorn jelly and a little softer set, with a bitterness that is grainier and less tannic. Of the two starch swaps this is the one that tastes nearest to the real thing.
6Cornstarch or Potato Starch, For Muk
Taste and texture differ
Not recommended
Named here only so you do not waste an afternoon.
What changes
Both will thicken and set, but the set is wrong.
Best for
thickening sauces
Cornstarch muk turns rubbery and slightly chalky, and potato starch muk sets sticky and then weeps water as it sits, which ruins the salad it is dressed into. Muk texture depends on a starch that gels tender and slightly brittle, and neither of these does. Use mung bean or buckwheat starch instead.

What is Acorn Flour?

Acorn Flour is milled from acorns that have been leached of their tannins and dried, and is sold as acorn meal or as dotori garu in Korean shops; its job in a recipe is flavour rather than structure, bringing a tan colour and a nutty, faintly bitter-sweet earthiness, but with no gluten and almost no starch it always leans on another flour to hold a bake together.

Cooking tips

Never bake with acorn flour made from unleached acorns. Raw acorns are heavy in tannins, which taste harshly astringent and can upset your stomach. Leaching means soaking the shelled, chopped or ground nuts through repeated changes of water until the water runs clear and a taste is no longer bitter. Cold leaching takes days but preserves the flour's binding ability; hot leaching is much faster but destroys it, giving a flour that will not hold together.
Acorn flour has no gluten and very little starch, so it cannot carry a raised loaf on its own. Keep it to about a quarter to a third of the total flour in yeasted bread, or you will get a dense damp brick.
Toast it briefly in a dry pan before using it in pancakes or crepes. Thirty seconds of heat brings the nutty side forward and takes the edge off any residual raw-flour flavour.
Store it in the freezer. Acorn flour is high in oil and goes rancid within a few weeks at room temperature, developing a sharp bitterness quite unlike its natural pleasant one.
Korean markets sell both a fine acorn starch intended for muk and a coarser acorn flour meant for noodles and pancakes, and the bags look very similar. Only the starch gels into jelly, so check what the packet is sold for before you commit a batch.

Frequently asked questions

Can I substitute regular wheat flour for acorn flour?

In a mixed-flour recipe, partly. Wheat flour will give you structure and a good rise, but you lose the nutty earthiness entirely and the result simply tastes like an ordinary bake. Since acorn flour is usually a flavouring flour used alongside others, replacing only its share with wheat often works fine. It will not work at all for dotorimuk, which needs a gelling starch rather than a flour.

Do I really have to leach acorns before making flour?

Yes. Unleached acorns are extremely astringent from their tannins, unpleasant to eat and capable of causing stomach upset. Shell them, chop or grind them, and soak them through repeated changes of water until the water runs clear and the taste is no longer bitter. Cold water leaching over several days keeps the flour's binding properties; boiling water is quicker but leaves a flour with no binding ability, which is fine for porridge and poor for baking.

Can I make dotorimuk without acorn starch?

You can make an excellent muk, but not dotorimuk. Mung bean starch makes nokdumuk and buckwheat starch makes memilmuk, both entirely traditional Korean dishes, both cooked exactly the same way, both dressed in the same soy, sesame and chilli dressing. Buckwheat is the closer of the two in flavour because it shares acorn's earthy bitterness. Cornstarch and potato starch are not worth trying, since they set gummy and weep.

Is acorn flour gluten-free?

Yes, acorns contain no gluten. That also means acorn flour cannot build structure on its own, so gluten-free recipes using it need eggs, a binder such as psyllium or xanthan gum, or a starch alongside it. If you are cooking for coeliac disease, check the packaging for shared-mill warnings.

Can I just leave acorn flour out?

Where it is one flour among several, yes, and you can replace its weight with chestnut, buckwheat or ordinary flour and lose only the flavour. Where the recipe is named after it, such as acorn noodles or acorn jelly, it is the dish rather than an ingredient in it, and the sensible move is to cook the mung bean or buckwheat version instead.

Related substitutes

More nuts & seeds substitutes

Acorn Flour substitute

Other acorn flour substitutes

2Buckwheat Flour

3Almond Flour or Hazelnut Flour

4Mung Bean Starch, For Muk Only

5Buckwheat Starch, For Muk Only

6Cornstarch or Potato Starch, For Muk