Preheat oven to 180 degrees C. Grease and flour a 25cm ring tin.
In a large bowl combine together the cake mix , pudding mix and cinnamon. Make a well in the centre and pour in the water, oil, eggs, sour cream and coffee liqueur. Beat on low speed until blended. Scrape bowl and beat for 4 minutes on medium speed. Stir in chocolate chips.
Pour batter into prepared cake tin. Bake in the preheated oven for 50 to 60 minutes, or until a toothpick inserted into the centre of the cake comes out clean. Allow to cool.