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blueberry crumb cake in a sheet pan
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Blueberry Crumb Cake in a Sheet Pan

This blueberry crumb cake is soft with a delicious sugary crumb topping. Baked in a sheet pan, it is easily cut into squares for many people or to freeze for later.
Prep Time15 minutes
Cook Time1 hour
Total Time1 hour 15 minutes
Course: Dessert
Cuisine: American
Keyword: Baking, Blueberries, Crowd, Dessert, Dessert for a Crowd, Sheet Pan
Servings: 12
Cost: $10

Equipment

  • sheet cake pan
  • measuring spoons and cups (or volume scale)
  • Measuring bowls
  • Whisk

Ingredients

Crumble Top Layer

  • 1 cup flour
  • 3/4 cup sugar
  • 1/2 cup butter melted/cooled
  • 1 tsp vanilla

Cake Layer

  • 1½ cups flour
  • 1½ tsp baking powder
  • 1 tsp baking soda
  • 1/4 tsp salt
  • 1¼ cups sugar
  • 1/2 cup butter melted/cooled
  • 3/4 cup sour cream or yogurt
  • 2/3 cup buttermilk or whole milk
  • 1 tbsp vanilla
  • 1 pint fresh blueberries
  • 1 tbsp flour for blueberries

Blueberry Topping

  • 1 cup blueberries

Instructions

  • Preheat the oven to 350°F and grease a 9x9 sheet pan (or add parchment paper)

Crumble Cake Layer

  • In a medium bowl, whisk together the sugar and flour
  • With a fork, mix in the melted butter and vanilla until it looks like a crumble top
  • Set aside

Cake Layer

  • In another medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set it aside
  • In a large bowl, whisk together the the melted butter, sugar, sour cream (or yogurt), buttermilk (or whole milk), and vanilla
  • Add in the flour mixture and stir until there are no more dry bits of flour. Do not overmix.
  • Measure the blueberries into a separate small bowl and add the small amount of flour to coat the blueberries
  • Fold the blueberries into the batter and distribute evenly throughout

Blueberry topping

  • Measure blueberries into a small bowl and have handy for assembly

Assembly

  • Pour the batter into the baking pan and spread out into the edges
  • Sprinkle fresh blueberries over the top evenly
  • Sprinkle the crumble over everything
  • Bake for 1-1.5 hrs until a fork comes out clean from the centre of the cake
  • Remove from the oven and allow to cool

Video

Notes

This cake stores well int the freezer to reheat later! I cut mine into squares and store them in a zip lock bag, easy to grab and go for a nice sweet treat.