3 apple hazelnut streusel Recipes

streusel topping, flour, cinnamon, cold unsalted butter , cut into pieces, gramsbrown sugar, toasted chopped hazelnuts, cake, all purpose flour, baking powder, a pinch of salt, unsalted butter, room temperature, granulated white sugar, egg, pure vanilla extract, milk, green apples , cut into thin (1/8 inch) slices

all-purpose flour, ground cinnamon, unsalted butter, cold and cut into pieces, brown sugar, hazelnuts, toasted and coarsely chopped, all-purpose flour, baking powder, salt, unsalted butter, room temperature, granulated sugar, egg, pure vanilla extract, milk, granny smith apples, peeled, cored , and cut into thin slices