ingredients:

For cake:2 cups sugar1-3/4 cups all-purpose flour3/4 cup dark or dutch-processed cocoa powder2 teaspoons baking soda1 teaspoon baking powder1 teaspoon kosher salt2 eggs1 cup buttermilk1 cup blackberry wine or red wine1/2 cup light olive or vegetable oil2 teaspoons vanilla extract
For frosting:2 cups (4 sticks) unsalted butter, softened and cut into cubes3 3/4 cups powdered sugar, sifted1/4 cup heavy cream2 teaspoons vanilla extract1/4 cup blackberry preserves
For chocolate glaze:3.5 ounces dark chocolate, chopped2 tablespoons heavy cream4 tablespoons powdered sugar, sifted4-5 tablespoons warm water
thanks to http://www.loveandoliveoil.com 

ingredients:

For cake:
2 cups sugar
1-3/4 cups all-purpose flour
3/4 cup dark or dutch-processed cocoa powder
2 teaspoons baking soda
1 teaspoon baking powder
1 teaspoon kosher salt
2 eggs
1 cup buttermilk
1 cup blackberry wine or red wine
1/2 cup light olive or vegetable oil
2 teaspoons vanilla extract

For frosting:
2 cups (4 sticks) unsalted butter, softened and cut into cubes
3 3/4 cups powdered sugar, sifted
1/4 cup heavy cream
2 teaspoons vanilla extract
1/4 cup blackberry preserves

For chocolate glaze:
3.5 ounces dark chocolate, chopped
2 tablespoons heavy cream
4 tablespoons powdered sugar, sifted
4-5 tablespoons warm water

thanks to http://www.loveandoliveoil.com