Moist, rich chocolate cake topped with creamy chocolate buttercream—easy enough for weeknight dessert yet indulgent enough ...

Marble Buttercream Cake . 4 sticks unsalted butter, at room temperature 2 lbs. confectioners’ sugar 2-3 Tbsp. whole milk 4 tsp. pure vanilla extract 1 tsp. salt 3 (6-inch) ...