Lemon Berry Firecracker Cake
A vibrant and festive cake bursting with tangy lemon and juicy berries, perfect for summer picnics and celebrations.
Ingredients
For the Cake
- 2.5 cups all-purpose flour
- 2 teaspoons baking powder
- 0.5 teaspoon baking soda
- 0.25 teaspoon salt
- 1 cup unsalted butter, softened (2 sticks)
- 1.75 cups granulated sugar
- 3 large eggs
- 1 teaspoon vanilla extract
- 1 tablespoon lemon zest
- 0.5 cup lemon juice
- 1 cup buttermilk
For the Berry Filling
- 2 cups mixed berries (strawberries, blueberries, raspberries), fresh or frozen
- 0.25 cup granulated sugar
- 1 tablespoon lemon juice
- 1 tablespoon cornstarch
For the Buttercream
- 6 large egg whites
- 1.25 cups granulated sugar
- 1.5 cups unsalted butter, softened (3 sticks)
- 1 teaspoon vanilla extract
- 1 pinch salt
- Red and blue gel food coloring
- Red, white, and blue sprinkles
- Edible glitter (optional)
Instructions
Preparation
- Preheat your oven to 350°F (175°C). Grease and flour three 8-inch round cake pans, or use baking spray with flour, and line the bottoms with parchment paper.
- In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
- In a large bowl or stand mixer, cream together the softened butter and granulated sugar until light and fluffy — about 3-5 minutes.
- Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next. Stir in the vanilla extract and lemon zest.
- Gradually add the dry ingredients to the wet ingredients, alternating with the buttermilk, mixing until just combined.
- Stir in the lemon juice.
- Divide the batter evenly among the prepared cake pans. Bake for 25-30 minutes, until a wooden skewer comes out clean.
- Let the cakes cool in the pans for 10 minutes before removing them to a wire rack to cool completely.
Berry Filling
- In a medium saucepan over medium heat, combine the mixed berries, sugar, lemon juice, and cornstarch.
- Stir constantly until the mixture thickens, about 5-7 minutes. Remove from heat and let cool completely.
Buttercream
- In a heatproof bowl over simmering water, whisk together the egg whites and sugar until the mixture feels hot to the touch and the sugar dissolves, about 5-7 minutes.
- Transfer to a stand mixer and beat on high speed until stiff peaks form and the bowl feels cool, about 10 minutes.
- Gradually add the softened butter a few tablespoons at a time, mixing until smooth.
- Beat in the vanilla extract and salt.
Assembly
- Separate the buttercream into three bowls, leaving one white and tinting the others red and blue.
- Level the cake layers if needed. Start with one layer on a serving plate, frost with white buttercream, and top with half the berry filling.
- Add the second layer and repeat the process. Finish with the third layer on top.
- Apply a thin layer of white buttercream over the entire cake as a crumb coat and chill for at least 30 minutes.
- Frost the entire cake with the remaining buttercream and decorate with sprinkles and edible glitter if desired.
- Chill in the refrigerator for at least 30 minutes before serving.
Notes
Serve with a scoop of vanilla ice cream or a dollop of whipped cream for added indulgence. For healthier options, consider low-sugar or gluten-free substitutions.