•  Preheat your oven to the temperature specified on the carrot cake mix box.
• In a large mixing bowl, combine the carrot cake mix, milk, oil, and eggs.
• Mix well until all the ingredients are fully incorporated.
• Add the grated carrots and 2 tablespoon chopped walnuts to the batter and stir until they are evenly distributed throughout. 
• Grease the 7x7 square pan with butter or cooking spray to prevent the cake from sticking. 
• Pour the carrot cake batter into the prepared pan, spreading it evenly. 
• Place the cake pan in the preheated oven and bake according to the instructions on the carrot cake mix box. Typically, this will take around 25-30 minutes.
• Once the cake is baked, remove it from the oven and let it cool completely on a wire rack.

How to Make Frosting

• While the cake is cooling, prepare the frosting according to the instructions on the carrot cake mix box.
• This usually involves mixing a powdered frosting mix with a specified amount of milk or water. Follow the instructions carefully to achieve the desired consistency. 
• Once the cake has cooled, spread the prepared frosting evenly over the top of the cake using a spatula or butter knife.
• Sprinkle the chopped walnuts over the frosting as a delightful topping. You can also add additional grated carrots or other decorations if desired. 
• Slice and serve!