So I made a chocolate orange marble cake and it’s just a tiny bit dry. I thought I’d tart it up with chocolate buttercream - I’m sure when my mum used to make this, she just chucked some cocoa in with the icing sugar and butter, but all the recipes I’ve seen online say to include melted chocolate. I’m not the most experienced baker and this seems like a recipe for melted butter disaster... would just chucking cocoa in work, do people think? Does anyone else make chocolate buttercream like this? Thanks!