Blueberry Sheet Cake – A Soft, Buttery Dessert Bursting with Fresh Blueberries

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There’s something special about a homemade cake filled with juicy blueberries. Every bite offers a perfect balance of sweetness, tender crumb, and bursts of fresh fruit that make this classic dessert impossible to resist. Whether you're baking for a family gathering, a weekend treat, or simply looking for a comforting dessert to enjoy with coffee, this Blueberry Sheet Cake is always a wonderful choice.

Unlike complicated layer cakes, a sheet cake is easy to prepare, bakes evenly, and serves plenty of people. The blueberries become wonderfully juicy as they bake, while the buttery vanilla cake stays incredibly soft and moist. Many bakers also add a touch of lemon zest because citrus naturally enhances the flavor of blueberries and creates a brighter, fresher taste.

Why You'll Love This Blueberry Sheet Cake

  • Soft and fluffy texture
  • Filled with juicy blueberries in every slice
  • Easy one-pan dessert
  • Perfect for breakfast, brunch, or dessert
  • Great for birthdays, picnics, and family gatherings
  • Delicious with fresh or frozen blueberries

Ingredients

For the Cake

  • 2½ cups all-purpose flour
  • 2 teaspoons baking powder
  • ½ teaspoon baking soda
  • ½ teaspoon salt
  • ¾ cup unsalted butter, softened
  • 1½ cups granulated sugar
  • 3 large eggs
  • 2 teaspoons vanilla extract
  • 1 cup sour cream
  • 2 tablespoons milk
  • 2 cups fresh blueberries
  • 1 tablespoon flour (for coating blueberries)

Optional Glaze

  • 1 cup powdered sugar
  • 2–3 tablespoons milk
  • ½ teaspoon vanilla extract

Instructions

Step 1: Prepare the Oven

Preheat your oven to 350°F (175°C).

Grease and lightly flour a 9×13-inch baking pan, or line it with parchment paper for easier removal.

Step 2: Prepare the Blueberries

Place the blueberries in a small bowl.

Sprinkle them with one tablespoon of flour and toss gently until coated.

This simple trick helps prevent the berries from sinking to the bottom while baking.

Step 3: Mix the Dry Ingredients

In a medium bowl, whisk together:

  • Flour
  • Baking powder
  • Baking soda
  • Salt

Set aside.

Step 4: Cream the Butter and Sugar

Using an electric mixer, beat the butter until smooth.

Gradually add the sugar and continue beating for about 3–4 minutes until light and fluffy.

Step 5: Add the Eggs

Beat in the eggs one at a time.

Mix well after each addition.

Add the vanilla extract.

Step 6: Finish the Batter

Add half of the dry ingredients.

Mix gently.

Add the sour cream and milk.

Mix again.

Add the remaining flour mixture and stir only until combined.

Avoid overmixing to keep the cake light and tender.

Step 7: Fold in the Blueberries

Using a spatula, gently fold the coated blueberries into the batter.

Be careful not to crush them.

Step 8: Bake

Spread the batter evenly into the prepared pan.

Bake for 35–45 minutes, or until a toothpick inserted into the center comes out clean.

Allow the cake to cool completely.

Step 9: Add the Glaze

Whisk together powdered sugar, milk, and vanilla until smooth.

Drizzle over the cooled cake.

Let the glaze set for about 10 minutes before slicing.

Tips for the Best Blueberry Sheet Cake

 

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