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Blueberry Crumb Cake

Rustic blueberry crumb cake with golden topping and powdered sugar.

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This Blueberry Crumb Cake is a simple, comforting dessert made with pantry staples and frozen blueberries. It features a tender, buttery cake studded with juicy berries and a generous, crunchy crumb topping. Perfect for brunch or an afternoon treat with coffee.

Ingredients

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  • For the Crumb Topping:
  • 3/4 cup all-purpose flour (90g)
  • 1/2 cup packed brown sugar (100g)
  • 1 tsp ground cinnamon
  • 6 tbsp cold unsalted butter, cubed (85g)
  • For the Cake:
  • 1 1/2 cups all-purpose flour (180g)
  • 2 tsp baking powder
  • 1/2 tsp salt
  • 3/4 cup granulated sugar (150g)
  • 1 large egg
  • 1/2 cup milk (120ml)
  • 1/4 cup unsalted butter, melted (57g)
  • 1 tsp vanilla extract
  • 2 cups fresh or frozen blueberries (300g)

Instructions

  1. Preheat oven to 375°F (190°C). Grease an 8×8 or 9×9 inch square baking pan and line with parchment paper.
  2. Make the crumb topping: In a medium bowl, whisk flour, brown sugar, and cinnamon. Add cold cubed butter and use fingers or a pastry cutter to work it in until mixture resembles coarse sand with some clumps. Refrigerate.
  3. Make the cake batter: In a large bowl, whisk flour, baking powder, salt, and granulated sugar.
  4. In a separate bowl, whisk egg, milk, melted butter, and vanilla until smooth.
  5. Pour wet ingredients into dry ingredients. Gently fold with a spatula until just combined; do not overmix.
  6. If using fresh blueberries, toss them in 1 tbsp flour. Gently fold blueberries into the batter.
  7. Spread batter evenly into prepared pan. Sprinkle chilled crumb topping over the batter, creating clumps with your fingers.
  8. Bake for 45-50 minutes, until a toothpick inserted into the cake center comes out clean. Cool in pan before slicing.

Notes

For frozen blueberries, use directly from freezer without thawing. To prevent sinking, toss fresh berries in flour. Store covered at room temperature for up to 2 days. Freeze for longer storage.

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