1/2 c. oil
4 eggs, well beaten
8 oz. sour cream or plain yogurt
2 tsp. cocoa
1 pkg. yellow cake mix
1 pkg. instant vanilla pudding
1 pkg. chocolate chips
1 tsp. cinnamon
1/2 c. sugar

Combine oil, cake mix, eggs, pudding mix, and sour cream; beat for 5 to 7 minutes. Mix together the remaining ingredients for filling. Grease a large bundt pan; put 1/3 of the filling mix on bottom of pan. Put in half of cake mixture and 1/3 more of filling. Add rest of cake mixture and top with remaining filling. Bake in 325 to 350 degree oven for 50 to 60 minutes.