noun. pastry with a topping of streusel.
noun. a crumbly topping for a pastry.
1. Noun, singular or mass If you're using streusel as a topping, it will taste better if you wait to add it before you bake the pie. 2. Adjective Alternately, dry them and crumble them for cake crumbs to use in streusel toppings or pies.
