Ingredients
Method
- Cook blackberries with sugar + lemon; strain and cool.
- Mix flour, cocoa, baking soda, baking powder, and salt.
- Beat sugar, oil, and eggs until smooth.
- Add buttermilk and blackberry purée.
- Mix wet + dry just until smooth.
- Stir in vinegar and food coloring.
- Bake at 350°F for 25–30 minutes in 8-inch pans.
- Cool completely.
- Make frosting by beating butter, cream cheese, sugar, and vanilla.
- Frost cake and decorate.
Notes
- Blackberry purée must be cooled before adding.
- Use oil, not butter, to maintain moisture.
- Dark cocoa powder deepens color for the gothic look.
- A crumb coat helps achieve a smooth finish.
