Probably one of the most frequent questions I get asked about eating acorns is, “Which acorns taste the best?” Now mind you, almost all acorns (without leaching) are bitter-tasting unpalatable little things. I recommend against putting them in your mouth. But leached acorns, that’s a different story. What I mean by leaching is; grinding and rinsing in water. But the deal with acorns is, you have to rinse them in water for a long time. The best way to do that is to grind them in the blender (with water) and then keep them in the refrigerator in the water for however long it takes to get the bitter tannic acid out. I have not tried acorns from all over the world. However, I have tried them from all over California and there are some bitter and not so bitter acorns. The leaching time ranges from one to four weeks. Because they are acidic and you are rinsing them, they won’t go bad in the refrigerator during the leaching process. The best tasting acorns I’ve ever had are the Tanoak acorns that grow along California’s coastal ranges and a little bit inland. I found a week was plenty of time to remove the tannic acid.
Suellen Ocean is the author of Acorns and Eat’em, a how-to vegetarian cookbook and field guide for eating acorns. Find it here: http://www.amazon.com/Acorns-Eatem-How–Vegetarian-Cookbook/dp/1491288973