Preheat oven to 450 degrees.

Melt butter and chocolate in double-boiler.

Beat eggs, yolks and sugar until light and thick.

Add melted chocolate slowly and beat to combine. Quickly beat in flour.

Divide among 4 greased and floured 4-ounce ramekins. Place on baking sheet and bake 6-8 minutes.

Invert each on a plate and let rest for 10 seconds. Carefully lift 1 side of ramekin to release the cake.

Serve immediately with ice cream or whipped cream.