These Cheesy Scalloped Potatoes are creamy, rich, and irresistibly comforting. Thinly sliced potatoes are layered with a homemade garlic cheese sauce and baked until tender with a golden, bubbly cheese topping. They’re the perfect side dish for holiday dinners, family gatherings, or any comforting meal.

Recipe Overview

Ingredients

Potatoes

• 3 pounds (1.4 kg) Yukon Gold or Russet potatoes, peeled and thinly sliced (⅛-inch thick)
• 1 small onion, thinly sliced (optional)

Cheese Sauce

• 4 tablespoons unsalted butter
• 4 tablespoons all-purpose flour
• 3 cups whole milk
• 1 cup heavy cream
• 3 cloves garlic, minced
• 1 teaspoon Dijon mustard
• 1 teaspoon onion powder
• ½ teaspoon garlic powder
• 1 teaspoon salt
• ½ teaspoon black pepper
• ½ teaspoon smoked paprika
• 2 cups shredded sharp cheddar cheese
• 1 cup shredded Gruyère or Monterey Jack cheese
• ¼ cup grated Parmesan cheese

Topping

• ½ cup shredded cheddar cheese
• 2 tablespoons grated Parmesan cheese
• 1 tablespoon chopped fresh parsley

Equipment Needed

• 9×13-inch baking dish
• Large saucepan
• Whisk
• Mandoline slicer or sharp knife
• Mixing spoon
• Aluminum foil

Instructions

Step 1: Preheat the Oven

Preheat the oven to 375°F (190°C).

Grease a 9×13-inch baking dish with butter or cooking spray.

Step 2: Make the Cheese Sauce

In a large saucepan, melt the butter over medium heat.

Whisk in the flour and cook for 1–2 minutes, stirring constantly.

Gradually whisk in the milk and heavy cream until smooth.

Add:

• Garlic
• Dijon mustard
• Onion powder
• Garlic powder
• Salt
• Black pepper
• Smoked paprika

Cook for 4–5 minutes, stirring frequently, until the sauce thickens.

Reduce the heat to low and stir in:

• Cheddar cheese
• Gruyère (or Monterey Jack)
• Parmesan cheese

Stir until the cheese is completely melted and the sauce is smooth.

Step 3: Layer the Potatoes

Arrange one-third of the sliced potatoes in the prepared baking dish.

Add a few onion slices (if using).

Pour one-third of the cheese sauce over the potatoes.

Repeat the layers until all the potatoes and sauce are used.

Step 4: Add the Topping

Sprinkle the remaining cheddar and Parmesan cheese evenly over the top.

Step 5: Bake

Cover the dish with foil.

Bake for 45 minutes.

Remove the foil and continue baking for 25–30 minutes, or until:

• The potatoes are fork-tender.
• The top is golden brown.
• The cheese is bubbling.

Step 6: Rest & Serve

Allow the potatoes to rest for 10–15 minutes before serving.

Garnish with fresh parsley.

Tips for the Best Cheesy Scalloped Potatoes

Slice Evenly

Use a mandoline slicer for uniformly thin potato slices so they cook evenly.

Shred Your Own Cheese

Freshly shredded cheese melts much better than pre-shredded cheese, which often contains anti-caking agents.

Don’t Rush the Resting Time

Letting the dish rest helps the sauce thicken, making it easier to serve.

Cover First, Then Uncover

Covering keeps the potatoes moist while they soften; uncovering at the end creates a beautifully browned crust.

Flavor Variations

Bacon Cheddar

Mix ½ cup cooked, crumbled bacon between the layers.

Garlic Herb

Add fresh thyme, rosemary, and chives to the cheese sauce.

Spicy

Stir in diced jalapeños or a pinch of cayenne pepper.

Ham & Cheese

Layer diced cooked ham between the potatoes for a hearty casserole.

Mushroom Swiss

Add sautéed mushrooms and substitute Swiss cheese for Gruyère.

What to Serve With

Main Dishes

• Roast chicken
• Grilled steak
• Baked ham
• Pork chops
• Meatloaf

Vegetables

• Steamed broccoli
• Roasted asparagus
• Green beans
• Brussels sprouts
• Garden salad

Storage Instructions

Refrigerator

Store leftovers in an airtight container for up to 4 days.

Freezer

Freeze tightly wrapped portions for up to 2 months.

Thaw overnight in the refrigerator before reheating.

Reheating

Oven

Cover with foil and bake at 350°F (175°C) for 20–25 minutes.

Microwave

Heat individual servings in 1-minute intervals until hot.

Nutrition Information (Per Serving)

Frequently Asked Questions

What’s the difference between scalloped potatoes and au gratin potatoes?

Scalloped potatoes are traditionally made with a creamy sauce, while au gratin potatoes typically include more cheese throughout the layers and on top. This recipe combines the best of both with a rich, cheesy cream sauce.

Can I make this ahead of time?

Yes. Assemble the casserole up to 24 hours in advance, cover, and refrigerate. Let it sit at room temperature for 20–30 minutes before baking.

Which potatoes work best?

Yukon Gold potatoes are naturally creamy and hold their shape well. Russet potatoes become extra soft and absorb the sauce beautifully.

Can I make it gluten-free?

Yes. Replace the all-purpose flour with a gluten-free flour blend or use cornstarch to thicken the sauce.

Why are my potatoes still firm?

The slices may be too thick, or the baking time may need to be extended. Cover the dish and continue baking until the potatoes are easily pierced with a fork.

Recipe Notes

✅ Rich and creamy

✅ Family-friendly

✅ Perfect for holidays

✅ Great make-ahead side dish

✅ Comfort food favorite

Make-Ahead Tip

Prepare the entire casserole the day before, cover, and refrigerate. Bake just before serving for the freshest flavor and texture.

Serving Suggestion

Serve alongside roast beef, baked ham, grilled chicken, or turkey with steamed green beans or roasted broccoli. Add warm dinner rolls for a complete comfort-food meal.

Chef’s Secret

For the creamiest scalloped potatoes, warm the milk and cream before adding them to the roux. Use freshly grated sharp cheddar and Gruyère, and let the casserole rest for at least 10 minutes after baking. This allows the cheese sauce to set, giving you perfectly creamy, restaurant-style slices every time.