Ahhh, the Mud Cake! Many different varities exist, mostly based upon what type of whiskey you add to the batter. I've used Scotch and Jack Daniel's, but I've also made it with Amaretto. That is really tasty!
Mississippi Mud Cake
1 c butter
1 T whiskey
3/4 c sugar
8 oz semi-sweet chocolate
1-1/2 c water
1-1/2 c self-rising flour (or 1-1/2 c flour with 1/2 t baking soda and 1-1/2 t baking powder)
1/4 c cocoa powder
1 t vanilla
Melt the butter in a saucepan and add the whiskey through the water. Stir and heat until chocolate is just melted. Stir the flour and cocoa powder together, and beat in the liquid mixture. Add the eggs and vanilla and beat until well combined. Pour into a 9 inch cake pan and bake for 40 to 45 minutes at 350. Leave the cake in the pan for 15 minutes and then remove to cool on a plate.
Make a few cupcakes if you only have an 8 inch cake pan. Bake them for about 18 minutes.