Mandala Cake

A colorful pink and blue vanilla cake decorated with dark buttercream frosting and a rainbow mandala pattern.


  • Cake:
  • 1 cup unsalted butter, room temperature
  • 2 cups sugar
  • 6 eggs, room temperature
  • 1 tsp vanilla extract
  • 3 cups all-purpose flour
  • 1 tsp baking soda
  • 1 tsp salt
  • 1 ¼ cups buttermilk
  • blue and pink food coloring
  • Buttercream:
  • 2 cups unsalted butter, room temperature
  • 1 tsp vanilla extract
  • 5 cups confectioner’s sugar
  • black and rainbow food coloring


  1. Bake the cake: Beat the butter and sugar with an electric mixer until pale and fluffy. Add the vanilla extract and eggs one a time, mixing with each addition. In a separate bowl, combine the flour, baking soda and salt. Add this to the batter in 2 additions, alternating with the buttermilk. Divide the batter between 2 bowls and dye them pink and blue. Pour the batter into 2 greased and floured 8-inch round cake pans. Bake at 350F for 20 minutes, or until a skewer inserted into the cakes comes out clean. Cool in the pans for 10 minutes, then transfer to a wire rack and cool completely.
  2. Make the buttercream: Beat the butter with an electric mixer until pale and fluffy. Add the vanilla extract and beat until combined. Add the confectioner’s sugar one cup at a time, then beat for 3-5 minutes, until fluffy. Dye ¾ of the buttercream black. Divide the remaining buttercream into 6 bowls and dye them the colors of the rainbow. Transfer the rainbow buttercream into piping bags fitted with small, round piping tips.
  3. Assembly: Slice the tops, bottoms and edges off both cakes to remove any browning. Slice each cake into 2 layers. Stack all 4 layers, alternating the blue and pink layers. Spread some buttercream between each layer. Coat the entire cake in a generous layer of buttercream. Use a skewer or a sharp knife to draw a mandala pattern on the top of the cake. If you make a mistake, don’t worry! Simply smooth the surface with a knife and start again! Trace over the buttercream etchings with the rainbow buttercream. Enjoy!