Prepare the square and circle cake pans with non-stick spray
Gather all of the ingredients according to your cake mix of choice (or make a homemade recipe!)
Mix all of the ingredients until smooth
Pour 1/2 of the cake batter into the square pan and 1/2 into the circle pan. Eyeball the cake batter to make sure the thickness of it in each pan looks similar.
Bake the cakes according to the cake mix recipe
Once cooled, remove the cakes from their pans
Cut the circle cake in half evenly
Position the square cake so it looks like a diamond, then place each half of the circle cake on top
Place the cake on a large plate or cake board. If you don’t have one, use wax paper or parchment paper and place the cake where you plan to serve it.
Liberally apply the frosting. It’s so easy! The frosting will fill in the imperfections and it will connect the 3 pieces
Add sprinkles, icing letters, birthday candles, whatever you want:)