United States Department of Agriculture
Agricultural Research Service

National Nutrient Database for Standard Reference Legacy Release
Try FoodData Central Basic Report:  11934, Potatoes, mashed, home-prepared, whole milk and butter added a 
heading Nutrient Unit
Value per 100 g

cup 210 g
Proximates Water g 75.61 158.78
Proximates Energy kcal 113 237
Proximates Protein g 1.86 3.91
Proximates Total lipid (fat) g 4.22 8.86
Proximates Carbohydrate, by difference g 16.81 35.30
Proximates Fiber, total dietary g 1.5 3.1
Proximates Sugars, total g 1.43 3.00
Minerals Calcium, Ca mg 24 50
Minerals Iron, Fe mg 0.26 0.55
Minerals Magnesium, Mg mg 18 38
Minerals Phosphorus, P mg 45 94
Minerals Potassium, K mg 284 596
Minerals Sodium, Na mg 317 666
Minerals Zinc, Zn mg 0.27 0.57
Vitamins Vitamin C, total ascorbic acid mg 6.0 12.6
Vitamins Thiamin mg 0.086 0.181
Vitamins Riboflavin mg 0.041 0.086
Vitamins Niacin mg 1.072 2.251
Vitamins Vitamin B-6 mg 0.222 0.466
Vitamins Folate, DFE µg 8 17
Vitamins Vitamin B-12 µg 0.07 0.15
Vitamins Vitamin A, RAE µg 38 80
Vitamins Vitamin A, IU IU 138 290
Vitamins Vitamin E (alpha-tocopherol) mg 0.12 0.25
Vitamins Vitamin D (D2 + D3) µg 0.2 0.4
Vitamins Vitamin D IU 10 21
Vitamins Vitamin K (phylloquinone) µg 2.0 4.2
Lipids Fatty acids, total saturated g 2.613 5.487
Lipids Fatty acids, total monounsaturated g 1.070 2.247
Lipids Fatty acids, total polyunsaturated g 0.199 0.418
Lipids Fatty acids, total trans g 0.149 0.313
Lipids Cholesterol mg 11 23
Other Caffeine mg 0 0

Footnotes
a  Recipe: Potatoes, 80%; whole milk, 14%; butter, 5%; and salt, 1%.