These slow cooker scalloped potatoes are creamy, cheesy, and wonderfully easy—just layer everything in the slow cooker and let it do the work. You’re going to love the tender potatoes, sharp cheddar, and cozy, no-fuss flavor.
Why You’ll Love It
- Only 6 main ingredients — potatoes, onion, evaporated milk, cheddar, salt, and pepper.
- No separate sauce — layer everything right in the slow cooker.
- Creamy and cheesy — evaporated milk and sharp cheddar create rich, comforting layers.
- Great for busy days — cook on HIGH or LOW while the slow cooker does the work.
- Easy side dish — serve with roasted chicken, meatloaf, ham, or pork chops.
Ingredient Notes
Use russet potatoes if you like a softer, old-fashioned scalloped potato situation. Yukon Golds are lovely too and have a richer, almost buttery flavor, though they do hold their shape a touch better. Peel russets most of the time, but Yukon skins can stay on for a more rustic feel.
Evaporated milk is important here. It gives the potatoes that creamy texture without requiring a separate sauce. Please don’t swap in sweetened condensed milk unless you’re trying to create a dessert that wasn’t requested. Whole milk isn’t quite the same either; it’s thinner and the finished potatoes won’t have that satisfying richness.
For cheese, sharp cheddar is my preference. The pre-shredded kind is perfectly fine. Freshly grated cheese melts more smoothly, but pre-shredded cheese keeps supper simple.
A small yellow onion works nicely. White onion is fine, too. Don’t use a huge onion unless you truly love onion, because it can take over the whole dish.
Ingredients
- Butter or nonstick cooking spray, for greasing the slow cooker
- 3 pounds russet or Yukon Gold potatoes, peeled if you like and sliced thin—about 1/8-inch thick, if we’re being precise
- 1 small onion, thinly sliced into half-moons
- 1 (12-ounce) can evaporated milk, shaken before opening
- 1 cup shredded sharp cheddar cheese, divided
- 2 teaspoons kosher salt
- 1/2 teaspoon black pepper
Instructions
- Lightly grease the inside of a 4- to 6-quart slow cooker with butter or nonstick spray. Don’t skip this little step unless you enjoy scrubbing baked-on potato glue later.
- Peel the potatoes if you want that classic soft, creamy scalloped-potato texture, or leave the skins on for a more rustic feel. Slice them into thin, even rounds, around 1/8 inch thick. A mandoline makes quick work of this, but watch your fingers—those things are not playing around. A sharp knife works just fine if you take your time.
- Thinly slice the onion into half-moons. They may seem like a lot while you’re standing there looking at them, but they soften down beautifully during the long cook and sort of melt into the potatoes.
- Spread about one-third of the sliced potatoes across the bottom of the slow cooker. Add one-third of the onion, then sprinkle over one-third of the salt, pepper, and shredded cheddar. It does not have to look perfect.
- Repeat those layers twice more—potatoes, onion, salt and pepper, then cheese—ending with a light sprinkle of cheddar on top. Try to distribute the seasoning as you go instead of dumping it all on the top layer; that way every scoop has some flavor, not just the first dramatic spoonful.
- Shake the can of evaporated milk well, open it, and slowly pour it evenly over the layered potatoes. Aim for as much of the surface as you can. The milk will settle down through the layers as everything cooks, so don’t panic if it looks like there isn’t enough liquid at first. There is. Trust the process.
- Cover the slow cooker and cook on HIGH for 3 to 4 hours or on LOW for 6 to 7 hours, until the potatoes are very tender when pierced with a fork and the edges look bubbly and creamy. Keep the lid on as much as possible. Every time you lift it, you add cooking time.
- Once the potatoes are tender, turn the slow cooker to WARM and let them sit, covered, for 10 to 15 minutes. This gives the sauce time to thicken up a little and makes serving easier. Or at least less sloshy. Taste and add a bit more salt and pepper if needed, then scoop all the way down to the bottom so each serving gets some of that creamy sauce.
Variations
The plain version is my favorite, actually. There’s something to be said for leaving a good thing alone.
Add diced cooked ham sometimes, about 1 to 1 1/2 cups layered in with the potatoes, and it turns this into more of a full meal. It’s especially good after a holiday dinner when you have that last bit of ham left over. A thinly sliced bell pepper tucked in with the onions adds sweetness and a little color.
For a cheesier top, add an extra 1/2 cup of cheddar during the last 20 minutes of cooking. Adding all the extra cheese at the beginning can make it a little greasy around the edges.
A pinch of garlic powder or dried thyme is nice if you want a little something extra without changing the basic character. You can also whisk 1 tablespoon all-purpose flour into the evaporated milk before pouring it over the potatoes if you prefer a thicker sauce.
Storage & Reheating
Let leftovers cool and get them into the refrigerator within 2 hours. They’ll keep well for 3 to 4 days. Cover them tightly; potatoes seem to absorb every refrigerator smell, and scalloped potatoes with a faint essence of tuna salad are not ideal.
For reheating, microwave individual portions until steaming hot, stirring gently halfway through if you can. You can also warm them in a covered baking dish in the oven, but the microwave is quick and easy.
The potatoes thicken after chilling, which is normal. A tiny splash of milk when reheating can loosen them if you want, though they are also delicious thicker the next day. They become almost casserole-like.
Final Notes
There’s a funny comfort in a recipe like this. It isn’t flashy, but it belongs on the table. The creamy layers and sharp cheddar make it an easy favorite.
Make these on a day when you need dinner to quietly take care of itself. Make them for company, or make them on a Wednesday because you found potatoes in the pantry and the weather turned gray. That’s enough reason. More than enough, really.
Slow Cooker 6-Ingredient Scalloped Potatoes
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Ingredients
- Butter or nonstick cooking spray For greasing the slow cooker
- 3 pounds Russet or Yukon Gold potatoes Peeled if desired and sliced thin, about 1/8-inch thick
- 1 small Onion Thinly sliced into half-moons
- 1 12-ounce can Evaporated milk Shaken before opening
- 1 cup Sharp cheddar cheese Shredded and divided
- 2 teaspoons Kosher salt
- 1/2 teaspoon Black pepper
Instructions
- Lightly grease the inside of a 4- to 6-quart slow cooker with butter or nonstick cooking spray.
- Peel the potatoes if desired, then slice them into thin, even rounds about 1/8 inch thick.
- Thinly slice the onion into half-moons.
- Spread about one-third of the sliced potatoes across the bottom of the slow cooker, then add one-third of the onion, salt, pepper, and shredded cheddar.
- Repeat the potato, onion, salt, pepper, and cheese layers twice more, ending with a light sprinkle of cheddar on top.
- Shake the evaporated milk well, open the can, and slowly pour it evenly over the layered potatoes.
- Cover the slow cooker and cook on HIGH for 3 to 4 hours or on LOW for 6 to 7 hours, until the potatoes are very tender when pierced with a fork and the edges look bubbly and creamy.
- Turn the slow cooker to WARM and let the potatoes sit, covered, for 10 to 15 minutes so the sauce can thicken, then taste and adjust the salt and pepper before serving.
