Robust Swiss Potato Casserole

This hearty casserole combines tender potatoes with rich Swiss cheese for a comforting meal everyone will love. It’s easy to prepare and perfect for family dinners or cozy gatherings.

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TIME1 hr 16 min

SERVINGS4

RATING5.0 / 5

01 / WHAT YOU NEED

Ingredients

¼ cup butter ¼ cup whole wheat flour 1 ⅔ cups water, divided 1 ½ teaspoons cornstarch 1 pinch salt and ground black pepper to taste ½ teaspoon ground thyme ½ teaspoon dried rosemary ¾ cup shredded Swiss cheese ¾ cup shredded Swiss Gruyere cheese 3 medium potatoes, peeled and thinly sliced 2 scallions, finely chopped 1 clove garlic, minced

02 / HOW TO MAKE IT

Let's cook.

Step 1

Start by melting the butter in a saucepan over medium-low heat, letting it simmer gently for about a minute. Gradually add the flour, a tablespoon at a time, whisking constantly until everything is smooth and well combined—this should take around 5 to 8 minutes. Slowly pour in 1 cup of water while whisking to keep the mixture lump-free, then take the pan off the heat.

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Step 2

In a small bowl, mix the remaining 2/3 cup of water with the cornstarch until fully blended. Stir this slurry into the gravy and whisk everything together.

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Step 3

Preheat your oven to 375°F (190°C).

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Step 4

Give the gravy a quick stir, then season it with salt and pepper to taste. Add the thyme and rosemary, followed by the Swiss and Gruyere cheeses. Toss in the potatoes, scallions, and garlic, stirring until the potato slices are well coated and separated in the cheesy sauce.

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Step 5

Transfer the mixture to an 8-inch square baking dish and spread it out evenly.

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Step 6

Pop it in the oven and bake for 40 to 50 minutes, or until the potatoes are tender and the top is nicely bubbling.

03 / EXTRA DETAILS

Good to know.

Cook's tip

- Use Yukon Gold or red potatoes for a creamier texture.
- Make sure to evenly layer the cheese to get a nice melt throughout the casserole.
- Let the casserole rest for a few minutes after baking to help it set and make serving easier.

Why you’ll love it

This dish is warm and comforting with a rich, cheesy flavor that pairs perfectly with tender potatoes. It’s filling and easy to make, making it a great option for family dinners or potlucks. The combination of Swiss cheese and creamy sauce adds a deliciously smooth texture that everyone will enjoy.

Serving ideas

Serve this casserole alongside a crisp green salad or steamed vegetables for a balanced meal. It also pairs well with roasted chicken or grilled sausages. A dollop of sour cream or a sprinkle of fresh herbs on top can add a fresh touch.

Storage & leftovers

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven or microwave until warmed through. For longer storage, freeze portions in freezer-safe containers and thaw overnight in the fridge before reheating.