Cake Ingredients

250 g (1 c. and 2 tbsp) unsalted butter
250 ml (1 c.) Guinness
75 g Dutch process cocoa ( 3/4 c.), sifted
275 g (2 + 1/4 c.) all purpose flour, sifted
2 tsp. baking soda
400 g (2 c.) sugar
2 medium eggs
150 ml (2/3 c.) sour cream
1 tbsp. good quality vanilla extract

Frosting Ingredients

300 g (1 + 1/3 cup) cream cheese
150 g (1+1/2 c.) powdered sugar, sifted
150 ml (2/3 c.) cream, whipped