Checkerboard Marble Cake is such a cute and fun cake to make for someone who, like me, cannot decide between chocolate and vanilla.
Preheat oven to 350 degrees. Prepare 4 - 8 inch cake pans by lightly spraying with baking spray, putting in a circle of parchment on the bottom of the pan, and then lightly spraying again with baking spray.
Mix chocolate cake batter by combining all ingredients and mixing on medium speed for 2-3 minutes, or until fully combined. Pour into pans, tap pans on counter several times to release bubbles, and bake for 25-30 minutes, or until a toothpick comes out with moist crumbs.
Mix together yellow cake batter by combining the cake mix, eggs, milk, and oil on medium for 3 minutes. Pour into prepared pans and bake for 25-30 minutes, or until tester comes out with moist crumbs.
Let all cakes cool completely, and then cut two circles out of each cake, and reassemble in alternating colors.
While cakes are cooling, mix up the filling by putting all filling ingredients into a mixing bowl and beating on high speed for several minutes, stopping as needed to scrape the sides of the bowl.
Place 1/3 of the filling mixture between each layer.
Make ganache by heating the cream, butter, and vanilla until simmering. Pour hot cream over chocolate chips and stir until melted and glossy. Let cool for about 5 minutes, stirring periodically, and then pour over the cake. Spread the ganache evenly over the top and over the sides of the cake.
Mix icing ingredients together, and place small dollops on the top of the cake. Using a butter knife, gently drag through the chocolate and the blobs to create a marbled pattern on top.