Preparing the Ingredients: Make sure that the butter and cream cheese are at room temperature to facilitate the mixing process. You can take them out of the fridge 30 minutes before starting preparation. Preheat the oven to 350°F (175°C). Grease the cake pan with butter and dust it with a little flour to ensure the cake doesn’t stick to the pan after baking.

Mixing the Batter: In a large bowl, beat the butter and cream cheese with an electric mixer on medium speed for 3-5 minutes until the mixture becomes light and fluffy. Gradually add the sugar to the mixture and continue beating until it becomes creamy and smooth. Add the eggs one at a time, making sure each egg is fully incorporated before adding the next. In a separate bowl, sift the flour and cocoa powder together. Gradually add the dry ingredients to the wet ingredients, alternating with the milk. Mix the ingredients until the batter is smooth, but be careful not to overmix. Finally, add the melted chocolate and chocolate chips to the batter and mix gently to achieve a rich and smooth texture.

Baking: Pour the batter into the prepared pan and spread the top using a rubber spatula or flat spoon. Bake the cake in the preheated oven for 60-70 minutes or until a toothpick inserted in the center comes out clean. If the cake starts to brown too quickly, you can cover it with aluminum foil to prevent burning. After baking, remove the cake from the oven and let it cool in the pan for 10 minutes, then transfer it to a cooling rack to cool completely.