Best Easy Coffee Cake Recipe

Preheat the oven to 350°F and grease an 8-inch square baking pan, ensuring all corners are coated for easy release.

In a mixing bowl, cream together 0.5 cups unsalted butter and 0.75 cups granulated sugar on medium speed until light and fluffy, about 3 minutes.

Add eggs one at a time, mixing well after each, then stir in sour cream and vanilla extract until the batter is smooth.

Combine all-purpose flour, baking powder, and salt; gently fold into the wet mixture without overmixing, stopping once no streaks remain.

Spread half the batter into the prepared pan, sprinkle with half the streusel (made from brown sugar, ground cinnamon, and 0.25 cups butter), then repeat with remaining batter and streusel. Bake for 35–40 minutes or until a toothpick inserted in the center comes out clean.