Preheat the oven and prepare the dish

• Preheat the oven to 160 °C.
• Butter a baking dish generously and set it aside.

Melt the butter

• Melt the butter gently in a saucepan over low heat.
• Let it cool slightly.

Whip the eggs and sugar

• Beat the eggs and sugar with a hand mixer on high speed until thick and pale, about 5 minutes.

Add the dry ingredients and butter

• Sift the cocoa powder and flour together with the salt.
• Add the vanilla and the melted butter to the egg mixture.
• Fold in the sifted dry ingredients until just combined.

Bake the pudding

• Pour the batter into the prepared baking dish.
• Bake until the top is a thin crust and the center is still soft and gooey, about 35 minutes.

Serve

• Let the pudding cool slightly.
• Serve warm, ideally with vanilla ice cream.