01 - Preheat oven to 425°F. Generously butter four 6-oz ramekins and dust with flour, tapping out excess.
02 - Set a heatproof bowl over simmering water. Add chopped chocolate and butter, stirring until completely smooth and glossy. Remove from heat.
03 - In a separate bowl, whisk whole eggs, egg yolks, and granulated sugar until pale and slightly thickened, approximately 2 minutes.
04 - Fold the warm chocolate mixture into the egg mixture until uniform in color.
05 - Sift flour over batter. Add vanilla extract and salt. Gently fold until just incorporated—do not overmix.
06 - Divide batter evenly among prepared ramekins, filling each about three-quarters full.
07 - Place ramekins on baking sheet. Bake 10–12 minutes until edges are firm but center still jiggles slightly.
08 - Let rest 1 minute. Run knife around edges, invert onto plates. Top with fresh berries, dust with powdered sugar. Serve immediately with whipped cream or ice cream if desired.