Butter and lightly flour four ramekins.

Melt the chocolate and butter together until smooth.

Whisk the eggs, yolks, and sugar until pale, then fold in the chocolate.

Gently fold in the flour until just combined.

Divide among the ramekins and bake at 425F for 11 to 12 minutes until the edges are set.

Let rest one minute, then invert onto plates and serve immediately.