Ingredients
Scale
- 2 ¾ cups all-purpose flour
- 3 tablespoons unsweetened cocoa powder
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 cup unsalted butter, room temperature
- 1 ½ cups granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 1 tablespoon white vinegar
- 1 tablespoon blue food coloring
- 1 ½ cups buttermilk, room temperature
- 2 cups fresh blueberries
- 1 lb cream cheese, room temperature
- 2 sticks (1 cup) unsalted butter, room temperature
- ½ cup blueberry preserves
- 6 cups sifted confectioners’ sugar
- 1 teaspoon vanilla extract
- Blue food coloring (optional, for frosting)
Instructions
- Preheat the oven to 350°F. Butter and flour two 9-inch cake pans and line each pan with parchment paper.
- In a medium bowl, whisk together flour, cocoa powder, baking soda, and salt.
- In a large bowl or stand mixer, cream butter, sugar, and oil until light and fluffy.
- Add eggs one at a time, beating well after each addition. Mix in vanilla, vinegar, and blue food coloring.
- Alternately add the flour mixture and buttermilk to the creamed mixture in three batches, beginning and ending with flour mixture. Fold in the fresh blueberries gently.
- Divide batter evenly between pans and bake for 30-40 minutes or until a toothpick comes out with a few moist crumbs.
- Cool cakes in pans for 15 minutes, then transfer to wire racks to cool completely.
- For the frosting, beat cream cheese, butter, and blueberry preserves until blended.
- Gradually add confectioners' sugar on low speed until combined, then add vanilla and optional blue food coloring.
- Increase mixer speed to high and beat until light and fluffy, about 5 minutes.
- Refrigerate frosting until firm enough to spread, then frost the completely cooled cakes.
Notes
Use fresh blueberries for best texture; frozen may release too much moisture. Adjust blue food coloring to achieve desired color. Chill finished cake slightly before serving for easier slicing.
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Method: Dessert
- Cuisine: American
Nutrition
- Calories: 420
- Sugar: 34g
- Sodium: 320mg
- Fat: 18g
- Saturated Fat: 9g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 58g
- Fiber: 2g
- Protein: 5g
- Cholesterol: 78mg