Step 1

Preheat the oven to 220C/425F/Gas Grease four 4-oz ramekins, and place them on a baking tray.

Step 2

Add the chocolate and butter to a large microwave-safe bowl and heat in 20 second intervals, stirring after each one, until melted and smooth.

Step 3

Add the eggs, egg yolks, and vanilla, and whisk until combined. Add the icing sugar and flour, and whisk until smooth and combined.

Step 4

Divide the mixture between the prepared ramekins. Bake for 12 - 14 minutes, or until the sides of the cakes are firm, and the centres are still soft and gooey.

Step 5

Carefully run a knife around the edges of each cake, then turn them out onto serving plates. Serve warm with a scoop of ice cream.