

Preheat oven to 140°C and grease and line a 20cm springform pan.
Mix melted butter, sugar, flour and cocoa together until smooth.
Beat 3 eggs together, then add them to the mixture, stirring until fully combined.
Pour the cake mixture into the prepared springform pan. Place the springform pan in the oven and bake for 29 to 35 minutes. For a soft and gooey cake, bake until just done; the longer it bakes, the more the batter will set.
Let the cake cool completely in the pan.
Once cooled, transfer the cake to a plate and sprinkle with icing sugar before serving.