Gourmet Foraging and Advanced Acorn Processing
...ich one you choose depends on how you plan to use the acorns. You use cold water leaching to make acorn meal suitable for baking. The cold water preserves the starchiness of the acorn meal, which makes it work well in breads and pancakes and muffins and such. Hot water leaching removes the starch, but seems to bring out the nutty flavor more, which makes it better for using the acorns in savory foods, like acorn burgers, or, Pascal says, in sauces...