More detailed directions (with pictures)
Quick note: make sure you don’t over-bake this cake, otherwise the melted chocolate in the middle will harden! You can also add cocoa powder to the mix if you want to increase the chocolate flavor in the cake.
Add the eggs in a mixing bowl
Beat the eggs well with an electric mixer until smooth and pale yellow in color.
Melt the butter and chocolate in a microwave or on a double boiler.
Add the melted chocolate to the mix.
Add vanilla essence to the mix.
Mix all the ingredients with a mixer.
Add the flour to the mix.
Grease 3 small ramekins with butter and divide the mix equally in 3 ramekins.
Bake for 10-12 minutes in a pre-heated oven at 350 degrees F.
Take out the ramekins, run a knife around the cake and turn it upside down to take it out. Do this slowly so that the melted chocolate does not come out of the cake.