Looking to bake the perfect chocolate cake, but worried about messing it up? These celebrity chefs have the tips you need to ...

Unopened, buttermilk will last for about 3 months ... this is one of the most seriously delicious cakes I've ever eaten. #5.

Melt the chocolate in a heatproof bowl ... Beat in the icing sugar and then the buttermilk. Place in a piping bag and pipe onto cake.

Was it a gorgeous layered cake with rich chocolate frosting ... Add cocoa mixture in 2 batches, alternating with the buttermilk. Divide batter evenly between pans. Bake until a cake tester ...