Preheat oven to 350*F and spray a bundt cake pan with cooking spray.
Pour half of chocolate batter into the bundt pan and smooth with a rubber spatula. Pour half of coffee batter over chocolate and smooth. Repeat with the second half of chocolate batter, and then coffee batter.
Run a knife through the middle of the batter, all the way around the pan once, slightly moving the knife up and down.
Bake for 40-45 minutes, or until a toothpick can be inserted into the center of the cake and it comes out clean. Let cool in pan for 15 minutes, then invert onto a cooling rack to cool completely.