The BEST Coffee Cake Recipe

Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish thoroughly to prevent sticking.

In a large bowl, cream together the softened butter and granulated sugar until the mixture is light and fluffy. This step integrates air to help create a tender cake.

Add eggs one at a time, mixing well after each addition to ensure even incorporation. Then, blend in the vanilla extract and sour cream, which add moisture and richness.

In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Slowly add these dry ingredients to the wet mixture, mixing gently until just combined to avoid overmixing and toughening the cake.

In a medium bowl, combine brown sugar, granulated sugar, cinnamon, and flour. Stir in the melted butter until the mixture resembles coarse crumbs, forming the streusel.

Spread half of the batter evenly into the prepared baking dish. Sprinkle half of the streusel mixture over the batter, then pour and spread the remaining batter on top. Finish by sprinkling the rest of the streusel evenly over the top.

Bake the cake in the preheated oven for 35-40 minutes. Check doneness by inserting a toothpick into the center; it should come out clean when the cake is done.

Allow the cake to cool slightly in the pan before slicing and serving. This lets the flavors meld and makes cutting easier.