Ingredients

  • 6 lbs yukon gold potatoes
  • 34 cup milk
  • 14 lb unsalted butter
  • 34 cup sour cream
  • 34 cup cream cheese
  • 1 cup parmesan cheese
  • 2 teaspoons onion salt
  • 1 teaspoon salt

Method

  • Peel and cut potatoes into large cubes and boil in salted water until tender (25-30 min).
  • When finished, drain potatoes and put back into pot.
  • Meanwhile, beat cream cheese, then stir in sour cream and onion salt.
  • Heat milk and butter in small sauce pan until butter is melted.
  • Add warm mixture to potatoes and mash with masher until smooth.
  • Fold in sour cream/cream cheese mixture and 3/4 cup of parmesan cheese (if they seem too thick, add more milk or butter until it is the desired consistency).
  • Spoon into casserole dish or 9x13 pan.
  • Bake covered with foil at 350 degrees for 35-45 minute.
  • Sprinkle top with remaining parmesan cheese after 15-20 minute.