Sunday, October 18, 2009

Scalloped Potato Casserole

Thin slices of seasoned potatoes, layered with onion and baked in a buttery milk sauce.
Thin slices of seasoned potatoes, layered with onion and baked in a buttery milk sauce.

Scalloped Potato Casserole

I grew up with two basic potato casseroles. One that was made with a buttery milk sauce that my Mama called scalloped potatoes; the other made similar but adding in cheese, that we called potatoes au gratin. I used to love it when Mama made them. Both are just simply heartwarming and delicious and a perfect potato side dish for cooler weather.

I'm not talking about those dehydrated packaged potatoes here, though I won't knock those either because just like everybody else, I've used a few of them in my lifetime too, although it's been years now. Do they even still make them? They certainly came in handy from time to time

I'm talking about made from scratch and really not all that time consuming to be honest, especially if you have a mandoline (and I highly recommend you get one) and worth every single second.

A favorite holiday side dish, although they also go wonderful with baked or grilled chicken, fried chicken or pan fried pork chops, and are a perfect fall or winter side dish with many other dinners.

To save a lot of work, slice your potatoes using a food processor, or pick up an inexpensive mandolin {affil link} like that pictured above. They are worth having, you will speed through prep like nobody's business, all slices will be uniformly thick, meaning that they will all cook in the same amount of time, and a mandolin is much less hassle to clean. Just take care with your fingers and your knuckles y'all, because they are very sharp!

This recipe makes about 4 servings so if you need to feed 6 or more people I recommend making two separate casseroles, rather than a single, large multi-layered dish to ensure the potatoes cook through well.

To make this recipe au gratin, see notes at the bottom of the recipe - you'll be layering in grated cheese, or check out my recipe for Perfectly Cheesy Potatoes au Gratin while you're here too!

For more of my favorite potato recipes, visit my page on Pinterest!

Scalloped Potato Casserole

Scalloped Potato Casserole

Yield: About 4 servings
Author: Deep South Dish
Prep time: 15 MinCook time: 30 MinTotal time: 45 Min
Thin slices of seasoned potatoes, layered with onion and baked in a buttery milk sauce.


  • 6 tablespoons salted butter, divided
  • 2 pounds russet potatoes, peeled, for 6 cups sliced
  • 1 medium clove garlic, smashed
  • 2 cups thinly sliced onion
  • 1/2 tablespoon olive oil
  • 1-1/2 cups evaporated or whole milk
  • 1 teaspoon kosher salt, divided
  • 1/8 teaspoon white or black pepper, divided
  • 1/4 teaspoon Creole or Cajun seasoning, or to taste, divided, optional


  1. Preheat oven to 425 degrees F. Lightly smash and peel the garlic; rub all over a 3-quart baking dish. Butter the dish with 1 tablespoon of the butter and set aside. 
  2. Peel the potatoes and slice thin, about 1/4 inch. A mandolin works fantastic for this. Hold the potatoes in a bowl of cool water to which 1/2 teaspoon of salt has been added; set aside. When ready to bake the casserole, drain potatoes, transfer to a clean dish towel and pat to dry. 
  3. Heat the remaining butter with the milk until the butter is melted and the milk hot.
  4. Heat the olive oil over medium heat and sauté the onion until cooked, but not browned. Layer 1/2 of the onion in the bottom of the baking dish. Add 1/2 of the potatoes on top of the onion. 
  5. Combine salt, pepper and Cajun seasoning and season potatoes with half; add remaining onion, then the remaining potatoes.
  6. Pour the hot milk and butter combination evenly over the top of the casserole, top with remaining seasoning and bake, uncovered, in the upper third of the oven, for about 30 minutes, or until until milk has been mostly absorbed and potatoes are tender. May pass under the broiler to brown top further. 
  7. Serves about 4 - make two pans for a larger serving.


A mandolin is the way to go for uniform cuts, but if you like the potatoes sliced thicker, or you don't have a mandolin, cut them about 1/4 inch thick, place them into a pot, cover with water and bring to a boil. Immediately turn off the heat, remove pot from the burner, and let them sit in the water for 5 minutes. Drain well, then proceed with recipe.

To Make This Au Gratin: Add 2-1/2 cups of shredded Swiss, sharp Cheddar cheese, or use your favorite cheeses or any combination of cheeses. Omit the onion if desired, divide the cheese into thirds, setting aside one third for topping the casserole. Layer 1/2 of the potatoes in the bottom of the buttered baking dish. Season with salt and pepper to taste and sprinkle about 1/3 of the remaining cheese on top. Repeat the layer of potatoes, salt and pepper and another 1/3 of the cheese. Reserve the last 1/3 of the shredded cheese for the last few minutes of cooking when you'll return the casserole to the oven for about 5 minutes, or until cheese is melted.

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