This easy recipe is a moist chocolate and vanilla sheet cake topped with a double chocolate buttercream frosting with melted semisweet chocolate and cocoa powder!
You'll only need a few simple ingredients to make this easy recipe, so let's round them up and get started!
Make the vanilla and chocolate cake batters, Then add dollops of the chocolate batter over the vanilla batter.
Use a butter knife to swirl through the batter to create the marble effect, then bake for 20 minutes.
Make the chocolate buttercream frosting, then spread it evenly on top of the cooled cake.
Slice and serve.