Best-ever Chocolate Cake

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Pouter Estate in Wylie, Texas in 1988.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 package devil's food cake mix
 * 1 small package instant chocolate pudding mix
 * 1 cup sour cream
 * 1 cup milk
 * ½ cup vegetable oil
 * ½ cup water
 * 4 eggs
 * 3 cups chocolate chips divided use
 * 6 tablespoons unsalted butter

Directions

 * 1) Preheat oven to 350°F.
 * 2) Grease and flour tube pan.
 * 3) In large bowl combine cake mix, pudding mix, sour cream, milk, oil, water and eggs.
 * 4) Beat until blended then mix in 2 cups of the chocolate chips.
 * 5) Pour batter into prepared pan and bake 50 minutes.
 * 6) Cool 15 minutes in pan then turn out onto a wire rack and cool completely.
 * 7) Melt butter in saucepan over medium heat.
 * 8) Add 1 cup chocolate chips and stir until smooth then drizzle over cake.