n a large bowl either place over a double broiler or in a microwave melt the chopped chocolate and butter together, just until the chocolate and butter have melted. Then whisk in the espresso powder and vanilla extract.
Divide the batter between ramekins and add 4 cherries to the top of each cake then use your clean finger to gently press them down so the cake batter covers them. Place the ramekins on a baking tray.
Bake for 12 minutes and check, you want the outer ½ inch to be baked and look set and the inner part of the cake to be jiggly- be careful not to overbake