Prepare the crockpot: Spray the inside of your crockpot with non-stick cooking spray.

Mix the cake batter: In a large mixing bowl, combine the chocolate cake mix, whole milk, canola oil, and eggs, whisking until smooth.

Pour batter into crockpot: Transfer the smooth cake batter into the prepared crockpot and evenly spread it.

Prepare pudding mixture: In a separate bowl, whisk together the chocolate pudding mix and milk until smooth.

Add pudding and chocolate chips: Pour the pudding mixture over the batter and sprinkle chocolate chips on top.

Cook: Cover the crockpot and set it to cook on high for 2 ½ hours.

Serve: Once done, let it cool for a few minutes and serve with ice cream or whipped cream.