Line your slow cooker with parchment paper. Mix all ingredients except chocolate chips until fully blended. Fold in chocolate chips. Add to slow cooker. Cook on low for approximately 4 hours. Cooking time will vary depending on your size.
The larger it is, the less cook time will be needed. The cake will be slightly “wet” in the center. This is a good thing, you don’t want to overcook it or you will not have the delicious molten effect. It’s best when the center is cooked just slightly beyond it’s original liquid state. Enjoy!