Sometimes simple is just as sweet. I know I'm a little late posting these, but I thought I would share the recipe. It really is a good recipe for cake mix improved (that is, if you do not mind using a mixture). I found it in the Bundt Classics Cookbook 
Chocolate Cake Rich
1 (18.25 oz) pkg. cake mix dark chocolate
1 (3.4 oz.) pkg. instant chocolate pudding
1 cup sour cream
1/2 cup of hot water
1/3 cup vegetable oil
4 eggs
1 1/2 cup mini chips semisweet chocolate
1. Preheat oven to 350 degrees.
2. Line cupcake pans with baking cups.
3. In a large bowl, combine all ingredients except the chocolate chips.
4. Mix 2 minutes at medium speed.
5. Increase the speed to medium-high; stir 3 minutes.
6. Stir in chocolate chips.
7. Pour into cake pans.
8. Bake at 350 for about 20 minutes or until an inserted toothpick comes clean and fresh
Makes about 24 cupcakes
. Note: To use this recipe in a Bundt cake pan and heat oven to 325 degrees. Grease and flour bundt pan 10-12 cups and fill 3/4. I did it this way several times and it is so good, he did not even need frosting. Just sprinkle some powdered sugar on top. Here Bundt Cake Pan
Recipe Bundt Classics, 03 .
Buttercream Frosting
1 cup (2 sticks) butter, softened
1 teaspoon pure vanilla extract
1 1b. 10X powdered sugar
1-3 teaspoons of milk, half and half or cream
1. Using a mixer, cream softened butter and vanilla with a blender until smooth.
2. Gradually add sugar, allowing the butter and sugar and cream together before adding more.
3. If you want a little more creamy, add a teaspoon of milk at a time and beat up until you get the right texture.
