Definition of streusel
: a crumbly mixture of fat, sugar, and flour and sometimes nuts and spices that is used as topping or filling for cake
Origin of streusel
German, literally, something strewn, from Middle High German ströusel, from ströuwen to strew, from Old High German strewen
First Known Use: 1909
Seen and Heard
What made you want to look up streusel? Please tell us where you read or heard it (including the quote, if possible).