Blue And White Marble Buttercream Cake

I wanted to do a littl.
Blue and white marble buttercream cake. Then remove the acetate and smooth over any imperfections you may have with a hot spatula or bench scraper. I made this cake for my friend last weekend. Putting it all together layer one marble cake cut side up onto cake board. In a medium bowl add 2 cups white.
1 1 2 c unsalted butter softened 1 2 c shortening 2 tsp vanilla extract 6 c powdered sugar 2 tb heavy cream non pareils for decoration optional. Use an offset spatula to fill in any gaps with more. Add a thick layer of white buttercream all over the cake. Add a 2 3 cup of vanilla buttercream over the cake.
Gently smooth over the acetate to make sure the buttercream is fully attached to the cake and pop in the freezer for about 25 30 minutes to firm up the frosting.