1Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 10 inch Bundt pan.
2In a large bowl, stir together cake mix , pudding mix and cinnamon. Make a well in the center and pour in water, oil, eggs, sour cream and coffee liqueur. Beat on low speed until blended. Scrape bowl, and beat 4 minutes on medium speed. Stir in chocolate chips.
3Pour batter into prepared 10 inch Bundt pan. Bake in the preheated oven for 50 to 60 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool.