for the cake
3 ounces semi sweet baking chocolate (you can use chocolate chips)
1 1/2 cups brewed coffee
3 cups sugar
2 1/2 cups all purpose flour
1 1/2 cups unsweetened cocoa powder
2 teaspoons baking soda
1 teaspoon baking powder
1 teaspoon salt
3 eggs
3/4 cup vegetable oil
1 1/2 cups buttermilk, room temperature
1 teaspoon vanilla
for the cream filling
5 tablespoons all purpose flour
1 cup milk
1 teaspoon vanilla
1 cup butter
1 cup granulated sugar
for the ganache
1 12 ounce bag semi-sweet chocolate chips
1 cup heavy cream
1 tablespoon butter