Preheat your oven to 200°C (390°F). Generously butter four ramekins and dust them with cocoa powder to prevent sticking.
Chop the dark chocolate into small pieces. Gently melt it over a bain-marie or in short bursts in the microwave, stirring until smooth. Let it cool slightly so it doesn’t cook the eggs.
In a mixing bowl, beat the butter and superfine sugar together until the mixture is pale, fluffy, and fragrant—about 2-3 minutes, with your mixer on medium speed.
Add the eggs one at a time, beating well after each addition. The batter should become glossy and slightly increase in volume, which indicates proper aeration.
Fold in the sifted flour and cocoa powder gently, just until combined. Be careful not to overmix, to keep the batter tender and airy.
Pour the slightly cooled melted chocolate into the batter and fold gently until the mixture is smooth and glossy—this is your rich, chocolatey base.
Divide the batter evenly among the prepared ramekins, smoothing the tops with a spatula or spoon for an even surface.
Place the ramekins on a baking sheet and bake for exactly 12-14 minutes. The edges should be set, but the center still jiggles slightly when shaken—this is key to the molten center.
Remove the ramekins from the oven and let them rest for 2 minutes, allowing the outer crust to set while the center remains molten.
Carefully invert each ramekin onto a serving plate and hold for a few seconds before gently lifting off—watch for the shiny, slightly crusted exterior and the gooey center that begins to ooze out.
Serve immediately while warm, enjoying the rich, velvety chocolate flow that spills out with each crack—perfect on its own or with a dusting of powdered sugar or a scoop of vanilla ice cream.
