Coffee jelly is a jelly dessert flavored made from black coffee and gelatin. Once common in British and American cookbooks, it now most common in Japan, where it can be found in most restaurants and convenience stores.
Coffee Jelly was first made at a branch of a Japanese chain coffee shop in the 1960s and became popular all over Japan. Coffee jelly is light and not too sweet, though you can adjust the sweetness to your liking. It’s perfect as an after-dinner dessert.