I've seen this recipe in many cookbooks and baking blogs, and it's amazing. It's supposed to be made as a bundt cake, but I did cupcakes for Jessie's shower.
1 4-serving instant chocolate pudding mix
4 large eggs
1 cup sour cream (not low-fat or fat-free)
1/2 cup warm water
1/2 cup vegetable oil
1 1/2 cups semi-sweet chocolate chips
Place all ingredients except chocolate chips in a large mixing bowl. Blend with an electric mixer for 1 minute. Stir down sides. Continue to mix on medium speed for 2-3 minutes. Stir in chocolate chips. Pour batter into greased bundt pan. Bake 45-50 minutes at 350 degrees. Cool 20 minutes. Invert onto serving platter. Dust with powdered sugar.
*Bake cupcakes for 18-20 minutes. Makes 24-30 cupcakes.
1/4 c. butter
2 c. powdered sugar
3 tbsp. cocoa
1 tsp. vanilla
2 tbsp. milk
*I had to double the frosting for the cupcakes.