From Wikipedia, the free encyclopedia. Dotorimuk (also spelled tot'orimuk) or acorn jelly is a Korean food which is a jelly made from acorn starch. Although muk means jelly, when used without qualifiers, it usually refers to dotorimuk. The practice of making dotorimuk originated in mountainous areas of ancient Korea, when abundant oak trees produced enough acorns each autumn to become a viable source of food.