Preheat your oven to 350°F. Grease a bundt pan or 9x13 baking dish.In a large mixing bowl, combine the chocolate cake mix and brownie mix. Add eggs, milk, oil, and sour cream. Mix until smooth and well combined, but do not overmix.
Step 2: Bake the Cake
Pour the batter into your prepared pan and spread evenly.Bake for 45–55 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.Allow the cake to cool slightly before adding the glaze.
Step 3: Make the Chocolate Glaze
In a saucepan over medium heat, combine milk and butter. Stir until melted.Whisk in cocoa powder and powdered sugar until smooth. Add chocolate chips and continue stirring until melted and glossy.
Step 4: Glaze the Cake
While the glaze is still warm, pour it over the cake to create a rich drizzle. Let it set before serving.
Notes
Tips: Add Chocolate Chips or Nuts will make the perfect addition