Chestnut flour refers to a type of flour made from ground chestnuts. It is used as an alternative to wheat flour in cooking and baking. Full definition
Do you think I can do s a direct substitute of chestnut flour for the almond flour? (elanaspantry.com)
I also have a very vivid memory of a delicious chocolate brownie I had in a restaurant in Paris, which I was told was made with chestnut flour too. (coconutandberries.com)
I've never used chestnut flour for frying — so interesting. (spiceroots.com)