I want to make some chocolate cup cakes for my dads birthday this weekend and I've got gold sprinkles and candles etc so I'm envisaging a really rich dark brown chocolatey topping.
Normally I would make a buttercream topping, but whenever I've made chocolate buttercream by adding cocoa it comes out a light brown colour.
Can I just keep adding cocoa until I get the colour I want or will it taste too bitter? Or could I add some melted dark chocolate? (would this separate/curdle?)
Any ideas or recipe suggestions would be gratefully received!!!