Preheat the oven to 425°F (220°C). Spray 3-4 ramekin cups with baking spray and place on a baking sheet
Step 2
Microwave the butter, bittersweet chocolate and semisweet chocolate in a large bowl on high until he butter is melted - about 1 minute
Step 3
Whisk until the chocolate is also melted, then stir in the sugar till well blended. Whisk in the eggs and egg yolks and vanilla
Step 4
Finally, stir in the flour and divide the mixture among the ramekin cups
Step 5
Bake the cakes until the sides are firm and the centres are soft, around 13 minutes, then let stand for 1 minutes, and invert onto individual plates, serving with ice cream while still warm