Prepare the ramekins

• Butter the ramekins generously and dust them with cocoa powder.
• Preheat the oven to 200 °C.

Melt the chocolate

• Melt the chocolate with the butter until smooth.
• Let it cool slightly.

Whip the egg whites

• Whisk the egg whites to stiff peaks.
• Gradually add the sugar and keep whisking until glossy.

Make the batter

• Stir the egg yolks into the melted chocolate mixture.
• Fold in the flour and cocoa powder.
• Gently fold in the whipped egg whites until light and cloud-like.

Bake

• Pour the batter into the ramekins.
• Bake until the tops are set and the centre still melts.

Serve

• Turn out the lava cakes and serve immediately while the centre is molten.