Transfer half your cake batter into a classic round pan and spread it out evenly before topping this layer with a bit of streusel. Then add in the remaining batter and sprinkle on the rest of the streusel. Bake the cake for about an hour.

Ina Garten updated her classic Sour Cream Coffee Cake Recipe to add more crumble topping. The recipe features a vanilla cake with cinnamon-nut crumble and a maple glaze drizzle. If you want more crumble without adding more sugar, you can stretch the recipe with nuts.