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Moist Sour Cream Coffee Cake with Generous Streusel

Two thick slices of moist coffee cake with a thick cinnamon streusel topping, served on a white plate.

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A simple recipe for a buttery, moist coffee cake featuring a thick layer of cinnamon streusel topping, perfect for breakfast or brunch.

Ingredients

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  • 1 3/4 cups all-purpose flour
  • 1 1/2 teaspoons baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup (2 sticks) unsalted butter, softened
  • 1 1/2 cups granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup full-fat sour cream
  • For the Streusel: 1 cup all-purpose flour
  • 1 cup packed light brown sugar
  • 1 tablespoon ground cinnamon
  • 1/2 cup (1 stick) cold unsalted butter, cut into small pieces

Instructions

  1. Preheat your oven to 350 degrees F. Grease and flour a 9×13 inch baking pan.
  2. In a medium bowl, whisk together 1 3/4 cups flour, baking powder, baking soda, and salt. Set aside.
  3. In a large bowl, beat the softened butter and granulated sugar with an electric mixer until light and fluffy, about 3 minutes.
  4. Beat in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
  5. Gradually add the dry ingredients to the wet ingredients, alternating with the sour cream, beginning and ending with the dry mixture. Mix until just combined; do not overmix.
  6. Prepare the streusel: In a separate bowl, combine 1 cup flour, brown sugar, and cinnamon. Cut in the cold butter pieces using a pastry blender or your fingers until the mixture resembles coarse crumbs.
  7. Spread half of the cake batter into the prepared pan. Sprinkle all of the streusel mixture evenly over the batter. Carefully spoon the remaining batter over the streusel layer.
  8. Bake for 45 to 55 minutes, or until a wooden pick inserted into the center comes out clean.
  9. Let the cake cool completely in the pan before slicing and serving.

Notes

  • For an extra layer of flavor, mix 1 teaspoon of cinnamon into the cake batter before adding the flour mixture.
  • If you prefer a thinner streusel, reduce the amount of streusel ingredients by one-third.
  • This cake stores well covered at room temperature for up to three days.

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