In South Korea, people have been preparing acorns into a specific dish known as ‘dotorimuk’ for generations. To make acorns safe, people in Korea crushed the acorns before passing water through the pieces. During this process, the water leaches out the toxins found in the acorns. Then, once dried, the crushed pieces are ground into a fine powder. From this powder, people in Korea make ‘dotorimuk,’ otherwise known as Korean acorn jelly.