I want to make a mango cake and a coconut cake. I see on cc that there is a mango and coconut filling, but I wonder if that would be too much of the same flavor for the cake. What do you think would go good with a mango cake and a coconut cake without being too sweet or similar? Thanks

Mangoes and Limes are very happy partners so perhaps a lime flavoured buttercream or cream cheese filling for your mango cake.