Blueberry Streusel Cake

A delicious layered cake featuring fresh blueberries and a cinnamon-sugar streusel topping. Made with a tender sour cream cake base and topped with a buttery crumb mixture, this cake is perfect for dessert or brunch.

8 servings
1 hr 45 min

Ingredients

  • 1 cup all-purpose flour
  • 1 tablespoon dark brown sugar
  • 1 tablespoon granulated sugar
  • ¾ teaspoon cinnamon
  • ½ stick unsalted butter
  • 1 cup all-purpose flour
  • 1 teaspoon baking powder
  • ¼ teaspoon baking soda
  • ½ teaspoon salt
  • ½ cup sour cream
  • ¾ teaspoon vanilla extract
  • ½ stick unsalted butter
  • ¾ cup granulated sugar
  • 1 whole egg
  • ½ pound blueberries
  • 1 serving whipped cream

Cooking Instructions

  1. 1.

    Preheat oven to 350°F with rack in middle. Line bottom and sides of a 9-inch square baking pan with heavy-duty foil, leaving an overhang on 2 sides. Butter bottom and sides of pan, then dust with flour, knocking out excess.

    10 min

  2. 2.

    Stir together flour, sugars, cinnamon, and a pinch of salt in a large bowl. Blend in butter with your fingertips or a pastry blender until mixture forms large clumps.

    10 min

  3. 3.

    Whisk together flour, baking powder, baking soda, and salt in a bowl.

    5 min

  4. 4.

    Stir together sour cream and vanilla in a small bowl.

    2 min

  5. 5.

    Beat together butter and sugar in a large bowl with an electric mixer at medium-high speed until pale and fluffy, about 5 minutes. Add egg and beat until well blended.

    5 min

  6. 6.

    At low speed, mix in flour mixture in 3 batches, alternating with sour-cream mixture and mixing until just combined.

    5 min

  7. 7.

    Gently fold in blueberries.

    3 min

  8. 8.

    Spoon batter into pan, smoothing top (preferably with an offset spatula). Crumble half of topping evenly over batter.

    5 min

  9. 9.

    Bake 25 minutes, then remove from oven and crumble remaining topping evenly over cake. Bake until a wooden pick inserted into center comes out clean, about 25 minutes more. Cool in pan 10 minutes. Lift out cake using foil and cool completely on rack.

    60 min