I made this Ombre Rosette Cake for engagement gift. It was basically a vanilla cake layered and coated with Swiss Meringue Buttercream.
The inside was layered with four colored of vanilla cake. The top was plain yellow/white cake. Then each of the bottom layer will have a different red-ish color.
I sprinkled on some red sand sugar to give the cake more color on top. And this is how the final product looks like!