Guinness Cake - cooking recipe

Ingredients

4 ounces unsalted butter
10 ounces dark brown sugar
2 medium eggs, beaten
6 ounces plain flour
1/4 teaspoon baking powder
1 teaspoon baking soda
7 fluid ounces Guinness stout (or other Irish stout)
2 ounces cocoa powder
Icing ingredients
4 ounces chocolate
2 tablespoons Guinness stout
2 ounces butter
4 ounces icing sugar, sifted
1 ounce walnuts, finely chopped

Preparation

To make the cake-----------.
Grease and line two 8-inch cake pans, and preheat the oven to 350F degrees.
Cream butter and sugar together.
Gradually beat in the eggs.
Sift the flour, baking powder and baking soda into a separate bowl.
Stir Guinness into cocoa.
Carefully fold in alternate quantities of flour and cocoa to butter/sugar mixture.
Spread mixture into pans and bake for 30-35 minutes.
Leave to cool in pans for 5 minutes before turning out.
To make the icing---------.
Melt chocolate with Guinness, and then beat in butter and leave to cool a little before beating in icing sugar.
Remove 1/4 of icing and stir in chopped walnuts.
When icing has cooled to a spreadable consistency, sandwich cake with walnut icing and use rest for top and sides.
Decorate with walnut halves and grated chocolate.