Pour/spread batter evenly into the 2 prepared cake pans.
Bake for around 30-35 minutes or until the cakes are baked through. To test for doneness, insert a toothpick into the center of the cake. If it comes out clean, it is done. Allow cakes to cool completely in the pans set on a wire rack. The cakes must be completely cool before frosting and assembling.
Place 1 cake layer on your cake stand, cake turntable, or serving plate. Spread frosting evenly on top.
Top with 2nd cake layer and evenly cover the entire cake with frosting.
Cut out 4 long strips of yellow fondant and lay the strips on top of the cake.See picture for reference. Since I had the left over buttercream frosting I added yellow food coloring and used a round tip to pipe yellow dots around the cake.
To get the Harry Potter logo I found a logo online and printed the logo and cut it out so I could trace the pattern using black fondant. Once the logo is cut out place it on top of the cake.
Please note that you don't need to make a full batch of buttercream frosting for this recipe. Cut the recipe in half if you want buttercream in the middle of the cake instead of red velvet. I also added yellow buttercream around the cake. I just wanted to list the buttercream frosting if you wanted the exact same cake.