4 cups Mashed potatoes
1/2 cup sour cream
1 cup grated cheddar cheese
1/4 cup parmesan cheese
1/2 cup cooked and diced bacon
1/2 cup thinly sliced green onions
1/4 cup ranch dressing

Preheat oven to 350°F. Mix above ingredients together thoroughly. Place in baking dish covered loosely with foil.

Bake for 30 minutes.