Forget peak oil. Right now, I’m more worried about peak acorn. There are five large white oaks outside my door and the acorns are falling with vigor. Every few minutes, they tumble to earth with a clatter—muffled if they hit the ground, with a thud or clang if they encounter patio or metal lawn furniture on the way down. And that’s when conditions are calm. If there’s even the slightest hint of breeze, the trickle of plant hailstones turns into a cascade. I don’t look up when I leave the house—I get out of the danger zone, fast. I’d run, but when there are so many acorns loose on the ground, moving quickly is a recipe for a quick fall and a trip to the emergency room. So instead I saunter quickly—but with purpose.
This isn’t even a mast year, a time when the oak trees conspire among themselves and go all out in a nonstop orgy of acorn production. 2014 was the last mast year in North Carolina, where just venturing outside in September and October was a hazardous activity requiring a hardhat. I learned from an experience that when a small projectile like an acorn falls on your unprotected scalp at high speeds, it hurts enough to necessitate some serious swearing. Unlike Isaac Newton, who allegedly faced a similar problem with apples, I did not go onto to invent the calculus when this happened to me—my contributions to humanity were significantly less coherent.
During the fall of 2014, the acorns fell in an endless rain. Even when I could avoid them from above, they lay so thick on the ground like so many ball bearings that I needed to tread carefully. Camping in the mountains, I strategically sited my tent to avoid getting woken by an acorn to the face in the night. The squirrels, always busy, ramped up into overtime mode. The deer were happy, too, and more of them survived the winter than usual, even when a January polar vortex sent the temperatures plummeting to eight degrees in the central Piedmont.
There were so many acorns outside, I decided to imitate the animals and consume them for myself. Reading My Side of the Mountain as a child, I dreamed of imitating teenage mountain man Sam Gribley’s feasts of acorn pancakes and maple syrup on cold winter days in the Catskills of New York. If he could do it and enjoy it, I could do it, too. But how to go about it?
Collecting acorns in buckets was easy enough—there were so many on the ground, after all. Even so, I still needed to exercise discernment. Ripe acorns are brown and slip out of their caps easily, with little fuss, and they only fall of their own accord when ripe. Unripe acorns might be green, brown or some combination of the two, and cling fiercely to their caps. They sometimes get knocked out of trees by strong winds or impatient squirrels. I learned to quickly let those be, along with obviously empty, damaged, or rotten ones.
The next step was to outwit the acorn weevil (Curculio sp.) and the other critters that feed on acorns and make them unpalatable for consumption. In the case of the acorn weevil, the female drills a hole in the acorn using her impressive snout and lays her egg at the center. By the time I got to the acorns, the eggs had long since hatched and a white, wiggling grub had consumed much of the nutmeat, leaving a scattered trail of black feces behind. Sometimes the grub had drilled hole in the shell, and wiggled out into the ground to pupate, other times it was still in the acorn when I found it. How to separate out the weevil-damaged nuts without examining every acorn individually?
Living in California, I learned the secret of sorting acorns courtesy of a massive live oak that would scatter leaves and acorns into a nearby swimming pool. Good acorns sank, rolled around around at the bottom of the pool and need to be fished out with a net; non-viable acorns floated and need to be fished out with a net. Good acorns would occasionally send out little bubbles, swell up, and sprout if you got to them before the chlorine killed them; bad acorns had holes in the shells, a grub inside, or proved to be hollow and empty when you picked them up. Buoyed by this knowledge in 2014, I hosed down my buckets of acorns and skimmed off the ones that floated to the surface. Easy.
Cracking the acorns was more tedious and time-consuming. Lacking a machine, I did it the way Sam Gribley did it—by hand. It was relaxing to sit outside in the crisp fall air, cracking the nuts, peeling back the shells, and tossing the contents into a bowl, but it took a long time to process a few pounds even when I got into the groove.
But I still wasn’t done yet. Acorns are bitter, full of tannins that must be removed if they are to be even remotely palatable. Acorn lore said that white oaks tended to have fewer tannins than red oaks, and that the exact amount varied from tree to tree, but I was still going to have to soak my shelled acorns in order to leech the soluble tannins out in the water, and change the water frequently over time.
Every forager on the Internet has their own preferred methods for leeching acorns, and the array of practices was dizzying. Do you grind first and then soak, or soak first and then grind? The former is easier because the tannins leach faster from a greater surface area. In the interest of science, though, I tried both. How long do you soak, and how often do you change the water? My method was to change the water every few hours until I got tired of doing it, and let the results dry on a cookie sheet. Then I poured the resulting flour—the color and consistency of instant hot chocolate mix—into a jar, shoved it into the back of the freezer and completely forgot about it.
I found that acorn flour from 2014 a few weeks ago while cleaning out the freezer, just as a fresh crop of acorns was starting to fall. What better way to celebrate than to finally make the pancakes and taste the results of my labors?
I mixed the acorn flour with water, added a few beaten eggs and mashed bananas to hold everything together, and cooked them on a cast iron skillet. The results were flat and dense, chocolate-brown and crumbly in consistency, barely holding together. They were ugly but delicious, with a dense, rich taste that was nutty and flour-y at the same time, no doubt full of terroir—or terre-oak, I should say. A few of the undercooked pancakes had a faint trace of the slippery, bitter tannins, but that taste vanished when I toasted them. Tasty and filling, I ate them with maple syrup (of course) with a little jam on the side. I only had enough flour for a few batches, but overall my first venture into acorn cooking was a wonderful, if laborious, success.
I won’t be harvesting acorns this fall. So far, I consider it a success just to have avoided being hit on the head. But I suspect that when the next mast year is upon us, I’ll be convinced by the sheer weight of edible food outside my door to give it another shot. The exact cause and trigger of masting is a mystery—it’s difficult to predict exactly when that will be. With any luck, by the time the next mast year is upon us, I’ll have mast-ered the system of acorn processing, ready to feast again on the abundance. If I can’t dodge the acorn strikes, at least I’ll have way to get even.