- 2 cups (250g) all-purpose flour
- 1 and 1/2 teaspoons baking powder
- 1/2 teaspoon baking soda
- 1/2 teaspoon salt
- 1/2 cup (115g) unsalted butter, softened
- 1 cup (200g) granulated sugar
- 2 large eggs at room temperature
- 1 teaspoon vanilla extract
- 1 cup (240ml) buttermilk at room temperature
- Zest of 1/2 lemon
- 1 and 1/2 cups (180g) fresh blackberries
For the Blackberry Buttercream Frosting:
1 and 1/2 cup unsalted butter, softened
5 cups (360g) powdered sugar, sifted
1/2 cup (60ml) blackberry puree (made by blending fresh blackberries and straining out the seeds)
1 teaspoon vanilla extract
Pinch of salt