AHi I'm making a lemon cake and using the raspberry mousse filling I found here on CC... What would be the best frosting to go with?
You can use your regular buttercream and add the zest of lemons in and/or on the frosting.
You can use your regular buttercream.
You can use your regular buttercream and add some raspberry to create raspberry buttercream.
I've made similar lemon/raspberry cakes/cupcakes and have used all the frosting combinations above--all of them taste great and compliment the cake & filling.
If you do not have a "regular buttercream", here is an excellent recipe for a crusting buttercream
BUNNYWOMAN'S MOCK SHACK::
ACream cheese icing is great on lemon cake! Cream cheese Swiss meringue would be even better.