Here is the info I used to customize. It is based on:

Ground Beef, Regular, Cooked -- 4 oz. Raw, Yield after Cooking
Cheese, Natural, Cheddar or American Type -- 1 Slice (1 oz.)

Food Name: 1/4 Pound Cheeseburger
Serving Size: 1 Serving

Calories: 354.87 kcal
Total Fat: 26.63g
Saturated Fat: 12.75g
Polyunsaturated Fat: 0.908g
Monounsaturated Fat: 10.21g
Cholesterol: 104.71mg
Sodium: 516.25mg
Potassium: 271.19mg
Total Carbohydrate: 0.363g
Dietary Fiber: 0g
Protein: 27.11g
Alcohol: 0.0g

Vitamin A: 7.88%
Vitamin C: 0.00%
Calcium: 21.38%
Iron: 22.28%
Vitamin D: 1.70%
Vitamin E: 2.97%
Thiamin: 2.72%
Riboflavin: 20.35%
Niacin: 30.18%
Folate: 3.16%
Vitamin B-6: 18.91%
Vitamin B-12: 111.46%
Phosphorus: 40.97%
Magnesium: 6.14%
Zinc: 34.65%
Copper: 3.0%