Oh wow -- take warning by me, a person should never try to transcribe a recipe from memory without the Authorized Version at hand for reference.
In re: the Killer Chocolate Bundt Cake, then:
1 pkg dark chocolate or devils' food cake mix (18.5 oz)
1 pkg. instant chocolate pudding (3.75 oz.)
1 cup sour cream (I've used plain yogurt w/o perceived loss of quality)
1/2 cup warm water
1/2 cup cooking oil (I forgot the oil...I'm sorry, I'm sorry, I'm sorry)
1.5 cups dark chocolate chips.
Combine everything but the chocolate chips and beat hard for 4 minutes. Fold in the Chocolate chips. Bake in your greased and floured* (12 cup) Bundt pan at 350 degrees for 50-60 minutes or until it tests done. Cool IN the pan, right side up, for 10-15 minutes before you turn it out on a rack to complete cooling.
*Instead of flour sometimes I dust the greased pan with cocoa powder -- v. nice!
Sprinkle with icing sugar (if you sprinkle it through a paper doily...very snazzy pattern too!)