Preheat your oven to 350°F and grease your pan.
Combine the mix, eggs, oil, and water in a large bowl. Stir until smooth—no overmixing!
Fold in shredded carrots and add-ins like pineapple or nuts.
Bake for 25–28 minutes. A toothpick should come out clean.
While the cake cools, blend 8 oz softened cream cheese, 1 cup powdered sugar, and 1 tsp vanilla. Spread it over the cooled cake, and top with a sprinkle of walnuts.
