Mix together cake mix, sour cream, eggs, water and 1 Tbsp cinnamon. Pour into greased 9-inch pie plate. Sprinkle 2 tsp cocoa evenly on top of the batter. Then sprinkle the chocolate chips. Bake 20- 25 minutes at 350 degrees. Serve warm with chocolate cinnamon sauce:
Mix together condensed milk, 2 Tbsp cocoa and 2 tsp cinnamon and salt. Microwave to a boil. Pour over the cake.