>>21438300Butternuts are a nut. Butternut squash is not a nut. Butternuts are also known as white walnuts, one of two (that I know of, unless hickory and pecan count; they're both in the walnut family but aren't called walnuts) species of walnut native to the Americas. The other, black walnut, makes for delicious ice cream when it's not committing crimes.