1 pkg. Duncan Hines yellow cake mix
1/3 c. cooking oil
1 pkg. pistachio instant pudding
4 eggs
8 oz. sour cream
1/4 c. cream de menthe

Mix all of the above in order given. Add 6 ounce package mint chocolate chips. Bake in well greased Bundt pan or long cake pan at 350 degrees for 50-55 minutes.