Spray the inside of your slow cooker with non-stick cooking spray.

In a large mixing bowl, combine the chocolate cake mix and instant chocolate pudding mix.

Add the milk to the dry ingredients and stir until well combined.

Pour the batter into the prepared slow cooker.

Sprinkle the chocolate chips evenly over the top of the batter.

Cover the slow cooker with the lid and cook on high for 2 to 3 hours, or until the edges are set and the center is still slightly gooey.

Once cooked, turn off the slow cooker and let the cake sit for about 10 minutes before serving.

For a richer flavor, try using dark chocolate chips instead of semi-sweet. You can also add a teaspoon of vanilla extract or a pinch of espresso powder to the batter for an extra depth of flavor. If you prefer a more intense chocolate experience, consider using a chocolate fudge cake mix. To make it more festive, top the cake with colorful sprinkles or edible glitter before serving. For a nutty twist, mix in a handful of chopped walnuts or pecans into the batter.