Line a 4 quart or larger slow cooker with parchment paper.
Using nonstick spray prep the parchment paper by liberally spraying it.
Combine the cake mix, 1 1/4 cups of milk, oil, and eggs in a large mixing bowl beating on low for 1 minute.
Increase to medium continuing to beat for 2-3 minutes or until the batter is smooth and glossy.
pour the batter into the prepped slow cooker.
Add the pudding mix and 2 cups of milk in a second mixing bowl beating on medium-low until the mixture thickens or between 3-4 minutes.
Pour the pudding all over the cake batter. Do Not Stir.
Toss chocolate chips on top of the pudding. Do Not Stir.
Place the lid on top of the slow cooker.
Cook on low for 2 1/2 hours or until the top of the cake is set.
Scoop Out into bowls and Enjoy!