Making Acorn Bread from Foraged Acorns, Part 2

Part 2 in what hopes to be a 3-part Acorn Bread series.

My fiancé liked the acorn bread I baked so much that we agreed to try it again, experimenting with a different leaching method and different flour combinations. For today's acorn bread, we tried a leaching method I gleaned from Jean Heglund's novel, Into the Forest (1996):

I used an old coffee filter to leach it, pouring boiling water through it again and again until the tea-colored liquid that dripped from the filter had turned clear, and the meal tasted mild, almost empty of flavor, like unseasoned beans. I mixed the leached meal with fresh water and simmered it until the mush was soft.

We decided to try using the coffee pot to leach the acorns. I had some doubts about it, since heating the acorns above a certain temperature cooks the starch, and the water would get to near-boiling but not actually boiling––i.e., perhaps not hot enough to fully leach the acorns.

Since we were going to cook the starch anyway, I dried the acorns at a slightly higher temperature, which helped crack the shells. The other benefit of this method is that any maggots hiding in the shells poke their nasty little heads out, so we could easily discard them.

Yuck... larvae poking out of heated acorn shells

After heating the acorns, we had to shell them––still the most tedious part. Another benefit of heating them at a higher temperature, though, is that many of the shells crack. I perfected the art of cracking whole shells with one tap of the hammer, so the process went a little more quickly than the last time.

Once shelled, my fiancé used a small Kitchen Aid food chopper to chop the acorns into a course meal.

He then transferred these chopped acorns into a coffee filter, and placed the filter in our coffee pot.

We then poured a pot of water into the coffee pot and waited, as though we were brewing a regular pot of coffee. The first time we did it, the water turned yellowish; after subsequent water changes, it became more of a clear, rosy brown.

The first pass of hot water over the acorn meal.

We went through about nine changes of water. While it took a little longer to get the same level of blandness in the acorns that I did with the boiling method, this method took far less effort. Some of the acorns still tasted a little tannic, but most were appropriately bland.

We used the same recipe from my last post, except that instead of using wheat flour, I ground some oats into flour and substituted that instead, making a gluten-free recipe.

The resulting bread was a little lighter in color and more crumbly in texture, but absolutely delicious.

Making Acorn Bread from Foraged Acorns

I have been wanting to make acorn bread ever since reading Octavia Butler's novel Parable of the Sower. Acorns have long been a food source in indigenous populations, yet many people tend to avoid using them because preparing acorns for consumption can be very time consuming. Both Green Deane's Eat the Weeds and the Prodigal Gardens posts on acorns provide extremely helpful step by step instructions on leaching acorns and making acorn flour. My own process represents a blend of these two.

First, I collected acorns in a bag. I avoided any with holes or cracks. After getting a bagful, I poured the acorns into a large bowl of water, discarding the acorns that floated to the top.

I then needed to dry the other acorns, which I did by putting them in the oven for about 20 minutes at 150 degrees.

After dehydrating the acorns, it was time to crack the shells. This was probably the most tedious part of the process, and it will destroy your fingernails. I literally cracked them open with a hammer, one by one, and then pried them apart with a knife.

Now the longest part of the process: leaching the acorns. Acorns have a very bitter taste because they are high in tannins. Leaching the acorn removes the bitter tannins, leaving a sweeter, nuttier taste in the meat. The blogs mentioned above indicate several methods for leaching, but mainly cold leaching and hot leaching. I chose the hot leaching method, which involves pouring the acorns into boiling water, boiling for 5-8 minutes, and then pouring out that water and pouring the acorns into another pot of boiling water. (Incidentally, the tannic water has excellent healing properties, so you may want to save it or even make it into ice cubes for medicinal purposes, like treating a rash or poison ivy.)

I was rather impatient with the boiling process, which Green Deane says can take many hours, but the Prodigal Gardens blog suggests only takes 5-6 water changes. I could still taste a little of the tannins, but the acorns were edible after I had done 5 water changes. Next time I will probably do many more, or try the cold method.

After leaching the acorns, I dehydrated them. There are plenty of ways to dehydrate food, including leaving it in the sun or cooking it at a low temperature in the oven, but I have a food dehydrator, so I used that.

Next step was to grind the acorns into a flour, first removing the papery sheaths. To grind the acorns, you can use a flour mill, a mortar and pestle (if you want to really do it the old-fashioned way), or a food processor (Vitamixes are great for making flours).

I used the following recipe to make my acorn bread:

1) Preheat oven to 400 degrees and grease a loaf pan.

2) Mix the following dry ingredients: 1 cup acorn flour, 1 cup wheat flour (oat or white flour is fine too), 2 tbsp baking powder, 1/2 tsp salt, and 1/4 cup raw sugar.

3) Add the following wet ingredients: 1 egg (slightly beaten), 1 cup milk, 1 tbsp honey, 3 tbsp oil.

4) Mix the ingredients and pour into loaf pan, then bake for 25 minutes (or until a knife or chopstick inserted into the loaf comes out clean).

5) (Optional): After 10 minutes of baking, drizzle honey over the top of the loaf.

The results were delicious! I added a pat of butter and ate a slice fresh from the oven.