|Region or state||Silesia|
|Associated national cuisine||German, Polish, Ashkenazi Jewish|
|Main ingredients||Crumbs: flour, sugar, fat|
Streuselkuchen (German pronunciation: [ˈʃtʁɔʏzl̩ˌkuːxn̩]; "crumb cake"), also known in English-speaking countries as crumb cake, is a cake made of yeast dough covered with a sweet crumb topping referred to as streusel. The main ingredients for the crumbs are sugar, butter, and flour, which are mixed at a 1:1:2 ratio. It is popular in German, Polish and Ashkenazi Jewish cuisines.
A streuselkuchen is usually a flat cake made on a baking tray and cut into oblong pieces. It should be very flat - about one inch - with crumbs making up about half of its height. The original version uses yeast dough, however a short crust is possible. A puff pastry at the bottom turns it into a prasselkuchen.
The recipe allegedly originated from Silesia. Many variants are prepared with fillings such as fruit (mostly of sour taste, e.g. apples, gooseberries, sour cherries, rhubarb), poppy seeds or creme or using a shortening-based dough.