

You'll need some kind of baking sheet - the one I used was 34cm x 23cm (13½ inches x 9 inches). Dab some butter in the corners (to stick down the paper with), then line it with a sheet of greaseproof paper, leaving some overhanging. Preheat your oven to 200☌ (392☏) for a convection oven, 220☌ (425☏) conventional. Anyway, have a go - if you don't mess it up, it's a seriously impressive thing!

It's best to take your time when attempting this recipe - I took three days over it, but I was also filming it for a video. It's made of layers of sponge cake, buttercream and chocolate ganaches, finished with a mirror-finish chocolate glaze.

Opera Cake was apparently invented at a cake shop in Paris in the mid-50s.
