Blackout Chocolate Cheesecake   Blackout Chocolate Cheesecake Ingredients Cake 3/4 cup sugar 1/2 cup flour 1/4 cup cake flour 1/2 cup cocoa powder 3/4 teaspoon baking powder 1/2 teaspoon baking soda 1/4 teaspoon kosher salt 1/2 cup butter, softened 2 eggs 1/2 cup sour cream 1 teaspoon vanilla extract Cheesecake layer 16 ounces cream cheese,