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and at the worst, harmful, those tannins can be leached from the acorns. Some animals, such as squirrels do this naturally. They hide the nuts and over time the water washes over them and leaches out those tannins. By the time the squirrel finds its stash, no more problem! Other animals such as deer seem to not be affected by the tannins.
Horses, on the other hand, are more like humans apparently. Acorns are definitely toxic to horses. Their stomachs simply can’t deal with the tannins.
How much tannin is in an acorn is dependent on the type of oak. While I can’t attest as to which varieties of local oaks might produce the tastiest acorns, apparently the Black Oak was a favorite of some California tribes for it’s supposedly sweeter flavor. I’m sure there’s an ongoing argument amongst acorn connoisseurs!
I was able to find descriptions of how you’d go about leaching the tannins from the acorns in order to make them edible. You actually turn the
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