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Decadent Blackberry Velvet Cake

This Decadent Blackberry Velvet Cake is a rich, moist velvet-style cake with a stunning purple hue and layers of smooth blackberry buttercream. Inspired by elegant desserts like Black Forest birthday cake and dark chocolate raspberry cake, this cake delivers one of the most memorable unique cake flavors for celebrations, holidays, and special occasions.
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Prep Time 25 minutes
Cook Time 30 minutes
Total Time 55 minutes
Ingredients Method Notes

Ingredients
  

  • For the Cake
  • 2½ cups all-purpose flour
  • 2 tablespoons cocoa powder for velvet depth
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • ½ teaspoon salt
  • ¾ cup unsalted butter softened
  • 1¾ cups granulated sugar
  • 3 large eggs room temperature
  • 1 cup buttermilk
  • ¾ cup blackberry puree or mashed blackberries
  • 1 tablespoon vanilla extract
  • For the Blackberry Buttercream
  • 1 cup unsalted butter softened
  • 3½ cups powdered sugar
  • ½ cup seedless blackberry puree or blackberry jam
  • 1 teaspoon vanilla extract
  • Pinch of salt

Method
 

  1. Make the Cake
  2. Preheat oven to 350°F (175°C). Grease and line two 9-inch round cake pans.
  3. In a bowl, whisk together flour, cocoa powder, baking powder, baking soda, and salt.
  4. In a large mixing bowl, beat butter and sugar until light and fluffy.
  5. Add eggs one at a time, mixing well after each addition.
  6. Mix in vanilla extract and blackberry puree until combined.
  7. Add dry ingredients and buttermilk alternately, beginning and ending with dry ingredients. Mix just until smooth.
  8. Divide batter evenly between prepared pans.
  9. Bake for 25–30 minutes, or until a toothpick inserted into the center comes out clean.
  10. Cool cakes in pans for 10 minutes, then transfer to a wire rack to cool completely.
  11. Make the Buttercream & Assemble
  12. Beat butter until creamy and smooth.
  13. Gradually add powdered sugar, mixing well.
  14. Add blackberry puree, vanilla, and salt. Beat until fluffy.
  15. Frost cooled cake layers evenly and assemble. Decorate as desired.

Notes

For extra flavor, spread a thin layer of blackberry jam between cake layers for a true blackberry jam cake effect.
Use seedless puree for the smoothest blackberry buttercream.
This recipe can be adapted into a blackcurrant cake by swapping the fruit.
Chill the cake briefly before slicing for clean, professional-looking cuts.
Store covered in the refrigerator for up to 3 days.