01 - Preheat oven to 425°F. Butter four 6 oz ramekins and dust with cocoa powder, tapping out the excess.
02 - Combine chopped chocolate and butter in a heatproof bowl over simmering water, stirring until smooth. Remove from heat and allow to cool slightly.
03 - In a separate bowl, whisk eggs, egg yolks, and sugar until the mixture becomes pale and slightly thickened.
04 - Gently fold the melted chocolate mixture into the egg mixture until thoroughly combined.
05 - Sift flour and salt into the mixture, folding carefully until just incorporated, avoiding overmixing.
06 - Divide the batter evenly among the prepared ramekins.
07 - Place ramekins on a baking sheet and bake for 11–12 minutes, until edges are set but centers remain soft.
08 - Remove from oven and let stand for 1 minute. Carefully run a knife around each cake and invert onto dessert plates.
09 - Serve immediately with a scoop of vanilla ice cream, dust with powdered sugar, and garnish with berries or mint as desired.