AuGratin Potatoes straight from the oven

Old Rotten Potatoes

Potatoes in my house often go through three phases.  This is especially true during the warmer months.  Because I buy  potatoes in bulk, sometimes we get tired of eating them, and they sit around longer than anticipated.  The first stage my potatoes have is the picture perfect potato that can be baked or steamed and served whole.  The second stages occur simultaneously as some potatoes become wrinkled and other have small eyes sprout.   Once potatoes have reached this point,  they are too ugly to bake.  In order to use them, they must first be peeled and any eyes cut off.  Of course, there is a fourth phase when the potatoes are rotten and inedible.   We try to avoid that phase altogether.  When they’re rotten, the only thing that can be done with them is to throw them into the trash, or the compost pile.

Almost everyone agrees that it’s OK to eat potatoes that have sprouted as long as you remove the sprouts and the eyes.  There are many mixed opinions about the safety of eating wrinkled potatoes.   You will have to make your own decisions.  Personally, I wash them, cut them in half and if they look and smell okay, I peel them, cook them, and we eat them.  I learned this from watching my mother who began her married life living out in the country and living off of the land.  They had a root cellar where they stored root crops and all of the things they canned.  Most of their food came from crops they grew and the animals they raised.  Anything else they needed, my parents bartered for with their surplus.  It was hard work, but they found it fulfilling.

I recently found myself staring at a bag of potatoes that had begun to sprout.  I realized that I would have to come up with a use for them quickly, or we would be throwing them out.  After carefully considering these potatoes, I decided that I would make some Old Rotten Potatoes.  Old Rotten Potatoes is what my youngest  heard whenever we said we were having Au Gratin Potatoes.  As a result, that’s what we have called them for years.  WE DO NOT EAT POTATOES THAT ARE ROTTEN.  This dish is made from potatoes that are edible, rotten potatoes have to be thrown out.  It’s really sad, but  this must be said.

My recipe is very straight forward and fairly simple as long as you know how to make a white sauce.  It’s really easiest if you have someone to help with washing and peeling the potatoes while you make the white sauce.  Children armed with peelers sometimes make wonderful kitchen helpers.

russet potatoes, washed and peeledI began by washing and peeling my potatoes.

thinly sliced potatoesThe potatoes were then thinly sliced.

thinly sliced raw potatoespotatoes layered in pan for au gratin, old rotten, potatoesI sprayed a 9X13″ pan with non-stick spray and arranged 1/2 of my potatoes on the bottom and sprinkle them with salt and pepper.

chopped onionI chopped an onion.

potatoes topped with chopped onionI sprinkled chopped onion on top of  the layer of potatoes.

The remainder of the sliced potatoes are placed into the panI added the remainder of the sliced potatoes and sprinkled them with salt and pepper.

cheese shredded for the cheese sauceI shredded 2 cups of cheese.  Jack and Cheddar were my choices, but this can be made with your favorite.

finely chopped garlicTwo cloves of garlic were chopped. (I confess, I chopped three, but we really like garlic)

melting butter with freshly chopped garlicThe white sauce was prepared by melting butter with some crushed garlic  in a sauce pan.  An equal amount of flour was stirred in to make a paste.

flour and butter cooking together to make the roux The flour and butter mixture, also called a roux, was cooked for a few minutes but not allowed to brown.

milk was added to the roux and whisked until it was thickenedMilk was added to the pan. This was stirred over medium heat until the sauce thickened.

finished cheese sauce is ready to be poured over the sliced potatoes and onions.Shredded cheese was added along with more salt and pepper and stirred until the cheese was melted and the sauce smooth.

The au gratin potatoes are covered with sauce and put into the ovenThe entire pan of sauce was poured over top of the potatoes and onions that were layered in the pan, and it was placed in a 350 degree oven.  (My oven is level; my camera was not.)

au gratin potatoes are done when the potatoes are tender and the dish is browned on topThe potatoes were baked for 1 hour until the potatoes were tender and the entire casserole was lightly browned.

The scalloped potatoes were devoured by my family. I served these with ham steaks and green beans.  They were delicious.  My family of 4 devoured nearly everything.  There was enough left for me to take a serving for lunch the next day.  If you wanted, you could add some chopped ham to the layers of potatoes and onions before baking and turn this into a one dish meal that could be served with a salad.

Here’s the recipe.  Give it a try and let me know what you think.

au gratin potatoes are done when the potatoes are tender and the dish is browned on top

Thanks for visiting Patty Cake’s Pantry.

5.0 from 11 reviews
Old Rotten Potatoes
Recipe type: Side Dish
Cuisine: American
Prep time: 
Cook time: 
Total time: 
Serves: 8-10
Potatoes and onions are layered and covered with a cheese sauce before baking in a moderate oven until golden brown and bubbly.
  • 8-10 medium sized potatoes. peeled and thinly sliced
  • 1 large onion, chopped
  • 4 tablespoons butter
  • 2 cloves garlic, minced
  • ¼ cup flour
  • 4 cups milk
  • 2 cups cheese, shredded--I used cheddar and jack, but you can use your favorite
  • salt and pepper to taste
  1. Wash and peel potatoes and thinly slice
  2. Arrange half of the potatoes in the bottom of a 9X13 inch pan that has been sprayed with non-stick spray.
  3. Sprinkle salt and pepper on top of potatoes
  4. Sprinkle chopped onion evenly on top of potatoes
  5. Add another layer of potatoes and sprinkle with salt and pepper
  6. In a 2 quart sauce pan, melt butter with minced garlic.
  7. When butter is melted, add flour and stir to make a paste.
  8. Add milk, whisking until flour and butter mixture is incorporated and there are no lumps.
  9. Stir constantly over medium heat until mixture comes to a boil and the sauce thickens slightly.
  10. Add shredded cheese and stir until the mixture is smooth. If it gets too thick, you many need to add a little bit more milk. The sauce needs to be thin enough to run between the layers of the potatoes, but thick enough that the final dish won't be runny. Keep in mind that it will thicken more during the baking process.
  11. Add salt and pepper to the sauce.
  12. Pour over layered potatoes and onions in the baking dish
  13. Bake at 350 degrees for 1 hour or until potatoes are tender and the top is lightly browned.

27 thoughts on “Old Rotten Potatoes

  1. The recipe is much more enticing than it’s name. This combo of potatoes and cheese is absolutely delicious and I will make it again for sure!

    1. Nancy, I agree that the name isn’t appetizing, but it’s what my youngest heard when we said au gratin potatoes. He also thought we said alligator whenever we said elevator. Even though we live in the states, we had to say we were taking the lift to avoid him crying hysterically when he was little. (He didn’t want to get eaten by the alligator.)

  2. Thank you so much for sharing this amazing potatoes recipe! Will surely have this again! It’s really easy to make and it tasted so delicious! Highly recommended!

    1. Liz, thank you for the comment. We love potato recipes because they are frugal and inexpensive. We like easy recipes here, and I’m glad you found this one to be easy.

  3. Never heard before of old rotten potatoes casserole now I need to make it as it looks delicious there’s nothing rotten nor old in here for sure =)

    1. Adriana, “Old rotten potatoes” is what my youngest son, Food Critic, heard when we said “Au Gratin Potatoes” when he was very young. The name stuck, and we’ve called them “old rotten potatoes” ever since.

  4. You can’t go wrong with potatoes and cheese! This is total comfort food and super easy to put together.

  5. These are the best potatoes ever! The cheese, onion, milk, and butter makes these potatoes so good! Definitely a side I will be making over and over again.

    1. Katie, thank you for the comment. I agree that the cheese, onion, milk, and butter make these potatoes good, and I’m glad that this is a recipe you’ll be making over and over again.

  6. This sounds and looks like an amazing side dish and that cheese sauce looks amazing! I cant wait to make this recipe, Thank you for sharing!

      1. I think its an appropriate name, telling people what they can make out of old potatoes it sounds rustic/Goldie oldie

        1. I’s important to remember that you can use older potatoes, but they need to be free of mold or decay. This dish isn’t really made out of old, rotten potatoes. This dish is named “Old Rotten Potatoes” because that’s what my son heard when we said “Au Gratin Potatoes.”

  7. I had a bunch of old potatoes and didn’t want to throw them out. So unlike the other commenters, I was glad to see the name for your recipe using old potatoes, lol. I plan on making them tomorrow with a bbq tritip. I’ll re-comment after and post my accolades I’m sure. Thanks for the recipe, Kim

    1. Kim, Just be careful to make sure the old potatoes aren’t really rotten. That could make you very sick. Having said that, I look forward to hearing your opinion of the recipe. I love tri-tip. Your comment made me mouth water.

  8. My mother-in-law has been making Old Rotten Potatoes (yes, that’s what we call it) for 50 years but makes it from memory so there’s no recipe… I was happy to find this. Her dish has fried hamburger, green onions and dill in it. I’ll be trying this recipe next week and preparing to 4x it to cook in my roasting oven for pot lucks at camp. Cheers from Nor Cal.

    1. Troy, your mother-in-law’s recipe sounds delicious. I may have to try adding ground beef and green onions to this recipe the next time I make it. Let me know how this works in a large roaster oven.

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