

Preheat the oven to 220°C. Grease four ramekins with butter and dust them with flour.
Melt the chocolate and butter together in a heatproof bowl set over a pan of simmering water (au bain-marie).
In a separate bowl, whisk the eggs, egg yolks, and sugar until the mixture is light and thick.
Gently fold the melted chocolate into the egg mixture, followed by the flour.
Divide the batter evenly among the prepared ramekins. Bake for 10-12 minutes, until the edges are firm but the centers remain soft.
Let the cakes cool for 1 minute, then carefully turn them out onto plates. Dust with powdered sugar and serve immediately.