Ingredients
Vanilla Cake
- 3 cups all-purpose flour
- 1 tablespoon baking powder
- ½ teaspoon salt
- ½ cup unsalted butter (softened)
- ½ cup vegetable oil
- 1 ½ cups granulated sugar
- 4 large eggs, at room temperature
- 1 tablespoon vanilla extract
- 1 ¼ cups milk
Blackberry Filling
- 2 ½ cups blackberries
- 3 tablespoons granulated sugar
- 2 tablespoons lemon juice
Blackberry buttercream
- 2 cups unsalted butter, softened
- 4 cups powdered sugar
- 2 tablespoons blackberry filling
Direction
Cake
- Preheat the oven to 350° F. Prepare 4 8-inch round cake pans with parchment paper circles and cooking spray.
- In a medium mixing bowl with a whisk, combine the flour, baking powder, and salt. Set aside.
- In a separate large mixing bowl, beat the butter, oil, and sugar until smooth and fluffy.
- Add the eggs, one at a time, mixing each until combined. Then add in the vanilla extract, and mix until combined.
- Add the dry mixture, alternating with the milk, until just combined and the batter is smooth.
- Divide the batter evenly into the 4 cake pans. Bake for about 20-25 minutes or until a toothpick inserted in the center comes out clean.
- Allow the cakes to cool completely while making the filling and buttercream.
Filling
- Combine the berries, sugar, and lemon juice in a blender or food processor, and blend until pureed.
- Transfer to a saucepan over medium heat. Allow the mixture to simmer for about 10 minutes or until it thickens.
- Transfer to a small bowl and chill until ready to use.
Buttercream
- In a large mixing bowl, beat the room-temperature butter until smooth and creamy.
- Gradually add the powdered sugar until completely combined.
- Add the blackberry filling 1 tablespoon at a time until the desired color and flavor are reached.
To assemble
- Level the cakes and stack them with a small layer of buttercream and blackberry filling in between each cake layer.
- Frost the entire cake with the remaining buttercream. Slice, and enjoy!
