Some nuts and seeds are edible. What kind they are is the question. Acorns have tannin ,but some oaks have more than others. The tannin make the acorn bitter. Oaks with the sweeter acorns are the basket, blackjack, swamp white oak, white oak, post oak and the chestnut oak. In the southern Atlantic states the basket or cow oak has sweet. Fat acorns 1 ½ inches long. In the west the sweetest are the California black oak, the canyon lie oak, and the west huge valley white oak.
To eat the acorn you should first. Sundry the acorns, and have the kernels removed. For storing this acorns place acorns in a high dry spot, to prevent mold. Now how to cook these acorns. You should first grounded into a mortar then into a fin meal. Second job is to have them leached in wood ashes., and water to get rid of the bitter outer tannin. Third the meal is placed into a filter, a piece of cloth over come pebbles for example, and have water poured of it. Several hour are needed to lean the meal. This makes a doughy structure. Which can be oiled into a much an taste like hot breakfast cereal. When cooking is swells to double its size. Serve an its ready to eat enjoy.