1.Mix the graham cracker crumbs, cocoa powder, sugar, and butter and press into the bottom of a 9 inch spring form pan.
2.Melt the chocolate in the cream in a double boiler.
3.Cream the cream cheese.
4.Mix in the sugar, chocolate, sour cream, eggs, vanilla, and Guinness.
5.Pour the mixture into the spring form pan.
6.Bake in a preheated 350F oven for 60 minutes.
7.Turn off heat and leave cheesecake in the oven with the door slightly ajar for 60 minutes.
8.Let it cool completely.
9.Chill the cheesecake in the fridge overnight.
Enjoy!
Recipe via ~ Closet Cooking
http://www.closetcooking.com/2011/03/guinness-chocolate-cheesecake.html