Steakhouse Mashed Potatoes

Yukon gold potatoes, whole milk, butter (sweet cream, salt), margarine (liquid and hydrogenated soybean oil, water, salt, contains less than 2% of vegetable mono and diglycerides, soy lecithin, citric acid, natural and artificial flavor, vitamin a palmitate added), sea salt, black pepper, potassium sorbate to protect flavor, mono-and diglycerides, ascorbic acid, citric acid.