Melt the butter and chocolate separately.

Separate the eggs and mix the yolks with the sugar until a light coloured cream is achieved.

Mix the chocolate in the egg yolk mixture then the butter.

Add the flour to the chocolate mixture until no lumps are left then mix in the cocoa powder.

Add the milk a quarter at a time, when all the milk is mixed in another bowl whip the egg whites with the salt until soft peaks form.

Fold the whites in the chocolate mixture.

Put everything in a perchament lined tray and put it in the praheated oven to 150 °C for about 60 minutes.

Once cooked let it cool and place it in the fridge overnight.

Serve and enjoy.