Directions

1. Preheat oven to 425F (220C).
2. Grease four ramekins with butter and dust with cocoa powder.
3. Melt chocolate and butter together, mixing until smooth.
4. In a bowl, whisk eggs, egg yolks, and powdered sugar until thick.
5. Pour chocolate mixture into egg mixture; stir gently.
6. Fold in flour and vanilla extract until just combined.
7. Divide batter evenly among ramekins.
8. Bake 12-14 minutes until edges are firm but centers are soft.
9. Let cool 1 minute, then invert onto plates and serve immediately.