0 a mixture made with butter, sugar, flour, spices, and sometimes nuts, that is put on the top of some cakes or breads, or a cake made with fruit and this mixture: --
The babka is usually topped with streusel.
These cakes sometimes have a crumbly or crumb topping called streusel and/or a light glaze drizzle.
Traditionally it is made of a yeast dough covered with a sweet crumb topping referred to as streusel.
