A Step-by-Step Guide to Preparing and Cooking with Acorns
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Acorns contain a lot of tannin which can cause severe stomach upset. According to Kansas State University, acorns do become safe to eat when they are roasted; the tannin content is reduced considerably by heating. (source: Reference.com)
My first attempt to leach the tannins out of white oak acorns was a disaster because I tried to boil them out. The heat locked the tannins in and I could not get them out afterward.
My second attempt was two days ago with leaching tannins out with cold water. Much better, and made a delicious acorn flour cake with raisins last night. A little astringent flavor did remain, but I only leached the acorn puree for 4 hours. Next time I'll do it for much longer and see how that turns out.
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.
While it's great that The Old Farmers 蜜桃恋人 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 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 and rinse. Getting all that tannin out is the most important step.
Everett De Morier
543skills.com
We are going to try this recipe over the weekend. Looks like we'll need to gather quite a few acorns for 7 people!