Step 1: Preheat the oven to 350°F (175°C) for even baking.
Step 2: Prepare the baking pan by lining with parchment paper or greasing it lightly.
Step 3: Mash the avocado in a mixing bowl until smooth and creamy.
Step 4: Combine the chocolate cake mix, egg, and sweetened condensed milk with the mashed avocado.
Step 5: Fold in the chocolate chips and chopped nuts until evenly distributed.
Step 6: Spread the batter evenly into the prepared baking pan.
Step 7: Bake for 25-30 minutes, ensuring the edges are set but the center remains gooey.
Step 8: Cool the bars in the pan for 10-15 minutes before lifting them out and cooling completely before cutting.
