This cake is very rich, a small piece will go a long way. We served it with ice cream but you could do whipped cream instead if you would rather. The chocolate lover in your life will thank you for this dessert.
In a large bowl, combine the cake mix, water, eggs, and oil. Beat on low speed for 30 seconds and then on medium for 2 minutes. Transfer to a greased 4 quart Crock-Pot.
In another bowl, whisk milk and pudding mix for 2 minutes. Let stand for 2 minutes or until soft-set. Spoon over cake batter, sprinkle the chocolate chips on top.
Cover and cook on high 3-4 hours or until a toothpick inserted in cake portion comes out with moist crumbs. Serve warm with ice cream or whipped cream.