Few side dishes are as comforting and satisfying as Slow Cooker Scalloped Potatoes and Onions. Thinly sliced potatoes are layered with sweet onions, butter, garlic, cream, and cheese, then slowly cooked until perfectly tender and golden around the edges. The result is a rich, creamy potato casserole that’s ideal for holidays, Sunday dinners, potlucks, or any family meal.
Using a slow cooker makes this recipe incredibly simple while allowing the potatoes to absorb all the delicious flavors. Every bite is buttery, cheesy, and loaded with caramelized onion goodness that pairs beautifully with roasted meats, grilled chicken, pork chops, or ham.
Whether you’re preparing a Thanksgiving feast or a cozy weeknight dinner, this classic potato side dish is guaranteed to become a favorite.
Recipe Overview
| Detail | Information |
|---|---|
| Recipe Name | Slow Cooker Scalloped Potatoes and Onions |
| Prep Time | 20 minutes |
| Cook Time | 5–6 hours (LOW) |
| Total Time | About 6 hours |
| Servings | 8 |
| Course | Side Dish |
| Cuisine | American Comfort Food |
| Difficulty | Easy |
Why You’ll Love This Recipe
This potato dish is:
- Rich and creamy
- Full of caramelized onion flavor
- Perfect for holidays
- Easy slow cooker recipe
- Family-friendly
- Great for meal prep
- Budget-friendly
- Comfort food at its best
- Minimal hands-on time
- Delicious with almost any main course
Every forkful is packed with tender potatoes, sweet onions, and a creamy cheese sauce.
Ingredients
Main Ingredients
| Ingredient | Amount |
|---|---|
| Yukon Gold potatoes, thinly sliced | 3 pounds |
| Yellow onions, thinly sliced | 2 large |
| Unsalted butter, melted | 4 tablespoons |
| Garlic, minced | 3 cloves |
Cream Sauce
| Ingredient | Amount |
|---|---|
| Heavy cream | 2 cups |
| Whole milk | 1 cup |
| Sharp cheddar cheese, shredded | 2 cups |
| Parmesan cheese, grated | ½ cup |
| Cream cheese, softened | 4 ounces |
Seasonings
| Ingredient | Amount |
|---|---|
| Salt | 1½ teaspoons |
| Black pepper | 1 teaspoon |
| Garlic powder | 1 teaspoon |
| Onion powder | 1 teaspoon |
| Dried thyme | 1 teaspoon |
| Paprika | ½ teaspoon |
Optional Garnish
- Fresh parsley
- Chopped chives
- Extra Parmesan
- Cracked black pepper
Equipment Needed
- 6-quart slow cooker
- Mandoline slicer or sharp knife
- Mixing bowl
- Measuring cups
- Cheese grater
Step-by-Step Instructions
Step 1: Prepare the Potatoes
Wash and peel the potatoes if desired.
Slice them into ⅛-inch thick rounds for even cooking.
Thinly slice the onions.
Step 2: Prepare the Cream Mixture
In a large bowl whisk together:
- Heavy cream
- Whole milk
- Cream cheese
- Garlic
- Salt
- Pepper
- Garlic powder
- Onion powder
- Thyme
- Paprika
Mix until smooth.
Step 3: Layer the Slow Cooker
Lightly grease the slow cooker.
Layer:
- Potatoes
- Onions
- Cheddar cheese
Repeat until all ingredients are used.
Pour the cream mixture evenly over the layers.
Finish with Parmesan cheese.
Drizzle the melted butter over the top.
Step 4: Slow Cook
Cover and cook:
- LOW: 5–6 hours
- HIGH: 3–4 hours
The potatoes should be fork-tender.
Step 5: Optional Browning
For a golden top, transfer the cooked potatoes to an oven-safe baking dish.
Broil for 3–5 minutes until lightly browned.
Step 6: Serve
Allow the potatoes to rest for 10 minutes before serving.
Garnish with parsley or chives.
Serve warm.
Pro Tips for the Best Scalloped Potatoes
- Slice the potatoes evenly for uniform cooking.
- Use Yukon Gold potatoes for a creamy texture.
- Freshly grate the cheese for smoother melting.
- Don’t skip the resting time before serving.
- Avoid lifting the slow cooker lid during cooking.
- Add extra cheese before broiling for a crisp, cheesy crust.
Delicious Variations
Bacon Scalloped Potatoes
Add cooked, crumbled bacon between the layers.
Ham and Potato Casserole
Mix diced cooked ham into the layers for a complete meal.
Garlic Parmesan Potatoes
Increase the garlic and Parmesan for extra flavor.
Herb Scalloped Potatoes
Add fresh rosemary, thyme, and parsley.
Three-Cheese Potatoes
Use cheddar, mozzarella, and Gruyère.
Spicy Version
Add diced jalapeños or crushed red pepper flakes.
What to Serve with Scalloped Potatoes
This rich side dish pairs beautifully with:
- Roast beef
- Baked ham
- Pork chops
- Fried chicken
- Meatloaf
- Grilled steak
- Turkey
- Roasted vegetables
- Green beans
- Garden salad
Make-Ahead Instructions
Assemble the casserole the night before.
Cover and refrigerate.
Place the insert into the slow cooker the next day and cook as directed.
Storage
Store leftovers in an airtight container.
Refrigerate for up to 4 days.
Reheating
Warm in the oven at 350°F (175°C) or microwave individual portions until heated through.
Add a splash of milk or cream if needed.
Freezing
Freeze cooled portions in freezer-safe containers for up to 2 months.
Thaw overnight before reheating.
Common Mistakes to Avoid
Cutting Potatoes Too Thick
Thin, even slices cook more evenly and create the best texture.
Using Pre-Shredded Cheese
Freshly shredded cheese melts more smoothly and creates a creamier sauce.
Cooking on High Too Long
Low and slow cooking produces the most tender potatoes.
Skipping the Butter
Butter adds richness and helps create the classic scalloped potato flavor.
Serving Immediately
Allowing the casserole to rest helps the sauce thicken beautifully.
Nutrition Estimate
| Serving | Amount |
|---|---|
| Calories | 420 |
| Protein | 14 g |
| Carbohydrates | 32 g |
| Fat | 28 g |
| Fiber | 3 g |
| Sodium | 520 mg |
Nutrition values are approximate.
Frequently Asked Questions
What’s the best potato for scalloped potatoes?
Yukon Gold potatoes provide a creamy texture, while Russet potatoes create a softer casserole.
Can I make this ahead?
Yes. Assemble it a day in advance and refrigerate until ready to cook.
Can I use half-and-half instead of heavy cream?
Yes, although the sauce will be slightly lighter.
Why are my potatoes still firm?
They may have been sliced too thick or need additional cooking time.
Can I add meat?
Absolutely. Ham, bacon, or cooked sausage are excellent additions.
Can I freeze leftovers?
Yes. Freeze individual portions for easy meals later.
Do I have to peel the potatoes?
No. Thin-skinned Yukon Gold potatoes can be used with the skins on after washing.
What cheese melts best?
Sharp cheddar, Gruyère, Monterey Jack, and Parmesan all melt beautifully.
Can I cook this in the oven instead?
Yes. Bake covered at 375°F (190°C) for 60–70 minutes, then uncover and bake until golden.
Why is resting important?
Resting allows the creamy sauce to thicken, making the casserole easier to serve.
Final Thoughts
These Slow Cooker Scalloped Potatoes and Onions are the ultimate comfort-food side dish. Tender layers of potatoes, sweet onions, rich cream, butter, and melted cheese come together in the slow cooker to create a dish that’s creamy, flavorful, and perfect for any occasion.
Whether you’re serving them alongside roast beef, baked ham, grilled chicken, or your favorite holiday meal, these scalloped potatoes are guaranteed to impress. Easy to prepare and full of homemade flavor, this timeless recipe is one you’ll return to again and again.