This is a variation on the famous brownie. Feel free to cover it with cream cheese icing like its big brother, or to use another stout-style beer in place of the famous Irish champagne.
PREHEAT THE OVEN TO 180°C (350°F/GAS 4). Break the chocolate into pieces and melt it with the diced butter in a microwave or double boiler (in a mixing bowl placed over a saucepan of gently simmering water). Let the mixture cool a little before adding the beer, then whisk togeth