01 -
Grease an 8-inch (20cm) round springform pan and line the base with parchment paper. Wrap the exterior with heavy-duty aluminum foil to prevent water seepage during baking.
02 -
Combine the dark chocolate and salted butter in a heatproof bowl. Melt gently over a bain-marie or in short intervals in the microwave, stirring until fully smooth and blended.
03 -
In a separate large mixing bowl, whisk the eggs and light brown sugar together until the mixture is pale and has doubled in volume—this incorporates important aeration for the finished cake.
04 -
Allow the melted chocolate mixture to cool slightly. Add it to the whipped eggs and sugar, folding carefully to prevent deflation. Sift in the cocoa powder and a pinch of salt, folding until no streaks remain.
05 -
Pour the batter into the prepared springform pan. Tap gently to eliminate air bubbles and smooth the surface.
06 -
Place the filled pan into a larger roasting tray. Pour hot water into the tray to reach halfway up the sides of the pan, creating a water bath for gentle baking.
07 -
Preheat the oven to 175°C. Bake for approximately 25–30 minutes. The cake is done when the top is puffed and slightly cracked, with a gentle jiggle remaining in the centre.
08 -
Remove the pan from the water bath and let the cake cool completely on a wire rack before unmoulding. Serve at room temperature or slightly chilled for best texture.