krumkake (say it with me: CRUMB caca):

a thin, crispy, bigger-than-your-hand Norwegian waffle cookie rolled into an unwieldy cone shape for two purposes: 1) to fool you into thinking it can hold ice cream or any other delicious treat without crumbling all over everything the second you try to eat or even hold it; 2) to crumble all over everything the second you try to eat or even hold it anyway