The first fall at my new place, I crouched by the old black walnut on my back fence line. I pried a stained green husk off one nut with my thumb. I found the shell underneath far too hard to bite into. So no, you cannot just eat black walnuts off the tree. Eating black walnuts raw off the branch does not work at all. The nut hides behind a thick green husk and a very hard shell. Eating black walnuts takes a few steps of prep first, and the prep is worth it.
Those green husks are messy business. A fresh husk stains your hands brown, and the stain sticks around for days. Wear thick gloves when you pull husks so your skin stays clean. The husk has to come off before you can even reach the nut. Under it sits a dark, ridged shell that shrugs off your teeth. You need real tools to open one, not a strong bite. A hammer, a vise, or a heavy rock all beat your jaw. Squirrels manage with sharp teeth, but you and I do not have those.
Timing matters when you gather them. Black walnuts drop in early fall, and the husks start out lime green before they darken. Grab the nuts while the husks are still firm and greenish. Once a husk goes soft, black, and slimy, mold can creep into the nut inside. A husk that is squishy and stinking is past its prime. Fill a bucket on a dry afternoon and get to husking soon after.
Pull or scrape the green husk off each nut soon after you gather them. Soft husks peel off with far less fight than dried black ones.
Spread the husked nuts in one layer somewhere dry and airy, like a garage shelf. Let them cure for about two weeks so the kernels dry and firm up.
Set a cured nut on hard concrete and strike the shell with a hammer. The shell is stubborn, so mind your fingers and swing with care.
Once the nuts finish curing, the payoff shows up fast. The kernel inside is oily and sweet, with a deep, earthy flavor that beats most store walnuts. It tastes bolder than the mild English walnuts in a bag. The flavor is strong enough that a handful goes a long way in a batch of cookies. You might wonder, are black walnuts edible, or are they best left for the squirrels? The cured kernels are safe to eat, and they shine in banana bread or on top of oatmeal.
A couple of habits keep your whole harvest good. Always cure and dry the nuts before you crack them, because damp kernels turn soft and spoil fast. When you open each nut, give it a quick sniff and a look. Toss any kernel that smells rancid or shows a fuzz of mold. One bad nut can taint a whole bowl, so it pays to check each one before it goes in your food.
Stored right, black walnuts keep for months. Leave them in the shell in a cool, dry spot and crack them as you need them. Shelled kernels go rancid faster, so keep those in the fridge or freezer. A sealed jar in the freezer holds the flavor for close to a year. Check the stored nuts now and then for any that feel light or rattle inside.
Eating black walnuts raw off the tree only earns you a sore jaw and stained hands. Put in the two weeks of curing instead. Strip the husk, dry the nuts, then crack the shell with a hammer. Do that, and you land one of the richest wild nuts you can forage.
Read the full article: Black Walnut Tree: Growing, Nuts, and Value
