"The first mention of acorns for human consumption was by the Greeks over 2,000 years ago. Over the course of human history it has been estimated that people have eaten more acorns than both wheat and rice combined.... Acorns have a low sugar content and therefore help control blood sugar levels... Acorns are a reliable source of carbohydrates, protein, 6 vitamins, 8 minerals, and 18 amino acids, and they are lower in fat than most other nuts. One handful of acorns is equivalent in nutrition to a pound of fresh hamburger..."
The article helpfully shows how to dry acorns in such a way as to kill insect larva while not making the nutmeat too dry! There are many scrummy recipes for tortillas, muffins, acorn meal mush, glazed acorn treats at the end!