Blackberry Red Wine Chocolate Cake

INGREDIENTS

2 cups

sugar

1 3/4 cups

all-purpose flour

3/4 cup

dark or dutch-processed cocoa powder

2 tsp

baking soda

1 tsp

baking powder

1 tsp

kosher salt

eggs

1 cup

buttermilk

1 cup

blackberry wine or red wine*

1/2 cup

light olive or vegetable oil

2 tsp

vanilla extract

2 cups

unsalted butter, softened and cut into cubes

3 3/4 cups

powdered sugar, sifted

1/4 cup

heavy cream

2 tsp

vanilla extract

1/4 cup

blackberry preserves

3 1/2 oz

dark chocolate, chopped

2 tbsp

heavy cream

4 tbsp

powdered sugar, sifted

4 tbsp

warm water