Costco scalloped potatoes are a rich and creamy side dish that combines tender potato slices with a luscious cheese sauce. Perfect for holidays, family dinners, or any special occasion, this dish pairs well with a variety of main courses. With its comforting flavors and simple preparation, it’s no surprise this dish is a crowd favorite.

Why This Recipe Is a Must-Try

Creamy and cheesy: A velvety cheese sauce coats every potato slice.
Family-friendly: Loved by both kids and adults.
Perfect for gatherings: Ideal for large meals and special occasions.
Easy to prepare: Requires simple ingredients and straightforward steps.
Versatile pairing: Complements meats, vegetables, and salads beautifully.

What Are Costco Scalloped Potatoes?

Costco scalloped potatoes are thinly sliced potatoes baked in a rich, creamy cheese sauce. Often served as a side dish, they offer a perfect blend of tender texture and savory flavor.

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Costco Scalloped Potatoes Ingredients

Russet or Yukon Gold potatoes: 4 large, peeled and thinly sliced
Unsalted butter: 3 tablespoons
All-purpose flour: 3 tablespoons
Milk: 2 cups (whole milk preferred)
Heavy cream: 1 cup
Cheddar cheese: 2 cups, shredded
Parmesan cheese: ½ cup, grated
Garlic powder: ½ teaspoon
Onion powder: ½ teaspoon
Salt: ½ teaspoon
Black pepper: ½ teaspoon
Fresh parsley: 2 tablespoons, chopped (optional, for garnish)

Step-by-Step Instructions to Prepare Costco Scalloped Potatoes

Prepare the Potatoes

Preheat your oven to 375°F (190°C).
Peel and thinly slice the potatoes (about ⅛-inch thick). Use a mandoline for even slices if available.

Make the Cheese Sauce

In a medium saucepan, melt the butter over medium heat.
Add the flour and whisk constantly for 1-2 minutes to create a roux.
Gradually pour in the milk and heavy cream, whisking to combine.
Add garlic powder, onion powder, salt, and pepper. Simmer until the sauce thickens, about 5 minutes.
Stir in the cheddar and Parmesan cheeses until melted and smooth.

Assemble the Dish

Grease a 9×13-inch baking dish with butter or non-stick spray.
Arrange half of the potato slices in an even layer.
Pour half of the cheese sauce over the potatoes, spreading evenly.
Layer the remaining potato slices on top and cover with the remaining cheese sauce.

Bake the Potatoes

Cover the dish with aluminum foil and bake for 45 minutes.
Remove the foil and bake for an additional 20-25 minutes, or until the potatoes are tender and the top is golden brown.
Let the dish rest for 10 minutes before serving.

What to Serve with Costco Scalloped Potatoes

Roast chicken or turkey: A classic pairing for hearty meals.
Grilled steak: Complements the richness of the potatoes.
Steamed vegetables: Broccoli, green beans, or asparagus balance the creaminess.
Fresh salad: Adds a refreshing, crisp contrast to the dish.
Dinner rolls: Ideal for soaking up the extra cheese sauce.

Expert Tips for Perfect Costco Scalloped Potatoes

Use starchy potatoes: Russet or Yukon Gold potatoes work best for a creamy texture.
Slice evenly: Uniform slices ensure even cooking.
Shred cheese fresh: Pre-shredded cheese may not melt as smoothly due to added anti-caking agents.
Let it rest: Allow the dish to sit for 10 minutes before serving to set the layers.
Customize the cheese: Swap cheddar for Gruyère or add a hint of smoked gouda for extra flavor.

Variations of Costco Scalloped Potatoes

Incorporate herbs: Mix in thyme or rosemary for added depth.
Make it spicy: Add a pinch of cayenne pepper or red chili flakes.
Vegetarian option: Layer in sautéed mushrooms or spinach.
Dairy-free version: Use plant-based milk and cheese alternatives.

How to Store Leftovers

Refrigerate: Store in an airtight container for up to 3 days.
Freeze: Wrap tightly in foil and freeze for up to 2 months. Thaw overnight in the refrigerator before reheating.

How to Reheat Leftovers

Oven: Reheat in a 350°F oven for 20-25 minutes, covered with foil.
Microwave: Heat individual portions for 1-2 minutes on high.
Skillet: Warm on the stovetop over medium heat, stirring occasionally.

Nutrition Value (Per Serving)

Calories: 320
Protein: 10g
Carbohydrates: 30g
Fat: 18g
Fiber: 3g
Sugar: 3g

FAQs

What type of potatoes are best for scalloped potatoes?

Russet or Yukon Gold potatoes are ideal for scalloped potatoes because they have a starchy texture that helps create a creamy and cohesive dish.

Can I make scalloped potatoes ahead of time?

Yes, you can prepare scalloped potatoes up to a day in advance. Assemble the dish, cover it tightly, and refrigerate. Bake just before serving, adding a few extra minutes to account for the cold dish.

How do I keep scalloped potatoes from curdling?

To prevent curdling, use whole milk and cream instead of low-fat options. Ensure the sauce is warm and mixed well before layering with the potatoes.

What can I add to scalloped potatoes for more flavor?

You can enhance the flavor by adding fresh herbs like thyme or rosemary, a pinch of nutmeg, or a layer of saut\u00e9ed onions and garlic between the potato slices. Adding a touch of Gruy\u00e8re or smoked gouda cheese also provides a deeper flavor profile.

Final Words

Costco scalloped potatoes are a deliciously creamy and cheesy side dish that elevates any meal. Easy to prepare and deeply satisfying, this recipe is a must-try for comfort food lovers. Serve it at your next gathering and watch it become the star of the table!