Gobs of whipped cream or vanilla ice cream for serving
In a large saucepan, heat and stir the water, 1/2 cup Jack Daniels, coffee, butter, and cocoa until the butter melts. Remove from heat and beat in sugar. Cool slightly, then whisk in the eggs, blending thoroughly.
In a bowl, sift together the flour, baking powder and salt. Beat into the chocolate mixture until incorporated. Stir in the pecans. Turn the batter into a greased and floured 9-inch tube pan or bundt pan. Smooth the top of the batter with a spatula.
Bake the cake on the middle level of a preheated 325 degree oven for 60 to 75 minutes, until a cake tester comes out clean.
Immediately sprinkle with the 2 tablespoons of Jack Daniels. Let cool on a rack, then remove cake from the pan.
NOTE: This cake is so rich it doesn't need icing, but it doesn't hurt to serve a lot of whipped cream or vanilla ice cream.