Loaded Potato Casserole

My sister-in-law wowed us with this yummy side dish at one of her children’s birthday parties. It’s super easy to throw together using leftover mashed potatoes, and full of flavor with cheeses, bacon, and french fried onions.  Enjoy!


Loaded Potato Casserole

  • 6 slices bacon
  • 3 cups leftover mashed potatoes  (made with butter and a little milk)
  • 1-2 cups milk (depending on how thin your leftover potatoes are to begin with)
  • 1 cup shredded pepper jack cheese
  • 4 ounces cream cheese, cubed
  • 3 cups shredded cheddar cheese, divided
  • 8 ounces sour cream
  • ½ teaspoon salt
  • 1 teaspoon pepper
  • 3 green onions, chopped (use the green and the white)
  • 1-2 cups french fried onions

1.  Cook bacon.  Drain, saving 2 tablespoons of the drippings. Crumble bacon into small pieces.

2.  Stir together the bacon drippings, mashed potatoes, milk, cheeses (JUST 2 CUPS OF THE CHEDDAR), sour cream, green onions, salt, and pepper.

3.  Spread into a greased 9×13 pan.  Sprinkle bacon, remaining cheddar and french fried onions on the top.  Bake uncovered at 350° for 45 minutes.  (Place a piece of foil on top if it starts to get too dark.)

What’s your favorite way to use up leftover mashed potatoes? 


  1. I don’t think we *ever* have left over mashed potatoes! But this looks delicious! How can you go wrong with mashed potatoes, onions, cheese & bacon! YUM!

  2. That looks REALLY good…but, we don’t ever have leftover mashed potatoes….

  3. Ooh, that looks just delicious!

  4. Debbie Jennings says:

    I make this a lot, but don’t always have left-over mashed potatoes, so I make them fresh. We all love this. They are my nephew’s favorite potatoes. Sometimes I do cheat and buy the real bacon bits and use them.

  5. Betty Falls says:

    It looks and sounds delicious. After holiday meals I usually have leftovers. This sounds like a delicious way to use the potatoes.

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