How to Prepare Acorns for Cooking

Oak branch with acorns


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Acorns are extremely nutritious and readily available to most of us, making them a healthful and convenient addition to many recipes. 

Note: Acorns do contain a bitter organic substance called tannin that must be leached out before eating. With a little patience, tannin is easily removed.

How to Leach Tannin from Acorns

  • Start two pots of water boiling. Drop shelled raw acorns into one pot, and boil until the water is the color of strong tea.
  • Strain the nuts through a colander and drop the strained nuts into the second pot of boiling water. Discard the dark water from the first pot, then refill it and bring the water to a boil again.
  • Repeat the process without interruption (do not let the acorns cool) until the water boils clear. This may take an hour or more, depending on the variety of acorn.

How to Grind Acorns for Cooking

  • Spread leached acorns to dry on cookie sheets in a warm place. When partially dry, coarse grind a few acorns at a time in a blender.
  • Spread the ground acorns to dry on cookie sheets, then grind again in a blender.

Acorn Pancakes Recipe

Once you have prepared your acorns, try them in this recipe adapted from Sharon Hendricks. Source: Texas A&M University AgriLife Extension


  • One egg
  • 1 tsp. salad oil
  • 1 tsp. honey or sugar
  • ½ c. leached and ground acorns
  • ½ c. cornmeal
  • ½ c. whole wheat or white flour
  • 2 tsp. double action baking powder
  • ½ tsp. salt
  • ½ c. milk

Directions: Break egg into bowl and add all ingredients, beating to create a batter. If batter is too thick, thin with additional milk. Pour batter onto hot, greased griddle and cook slowly until brown. Flip to brown opposite side. Serve with butter and syrup or jam.

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Well, the neighbors are gathering acorns for deer bait, and I was watching the squirls and other animals dance around the hords of large acorns. I thought, what is all the rage aboout? So I cracked and peeled a few while harvesting my own winter stash. I found the drier, larger acorns to have a bit of a sweet taste, but still some tannin. I gathered one bucket of shelled acorns to try these recipes, especialy the Acorn Candy and Flour. Thanks for the correction, I will try the no boil method.

These directions are incorrect

While it's great that The Old Farmers Almanac is promoting acorn consumption, the directions get it completely wrong.

Once you crack and remove the skins from the acorns you should puree them (assuming they're not dried yet--resoak if you dried them earlier or risk destroying your food processor).

Then you should cold leach the acorns: soaking the ground acorns in a large container, changing the water regularly over several days until the acorn flour is no longer bitter to taste (the water will never get clear but it will be very light in color at that point). Boiling the acorns cooks them, making them unsuitable as flour (though fine for adding to soups). Boiling also reduces their nutritional value and uses a lot of energy. If you do boil--you'll still need to grind first, and you'll need to boil multiple times to fully leach the tannins (so you'll need at least two pots of water boiling simultaneously).

Once leached, drain the flour and put it in the fridge and cook with it over the next week or two. You can cook muffins, pancakes, breads, etc. just remember to mix acorn flour with wheat flour for foods you want to rise: for example if a recipe calls for 2 cups of flour, use 1.5 cups of wheat and 0.5 cups of acorn flour--with that proportion you won't need to make any other changes to the recipe). At higher proportions you'll need to increase baking powder. Enjoy your acorns! And remember: if you find any acorn weevils, those are edible too!

Once the acorns have been

Once the acorns have been leached and roasted, allow them to air dry thoroughly. Then grind them and mix with honey, hickory nuts, a pinch of salt and spoon them by teaspoon onto a nonstick baking sheet and bake on low until set. Makes a great all natural candy.

The key is to rinse, rinse

The key is to rinse, rinse and rinse. Getting all that tannin out is the most important step.

Everett De Morier

We are going to try this

We are going to try this recipe over the weekend. Looks like we'll need to gather quite a few acorns for 7 people!

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