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Instructions:
- Preheat the oven to 375°F (190°C). Generously butter a 9×13-inch baking dish.
- Arrange the sliced potatoes evenly in the prepared baking dish.
- In a saucepan over medium heat, melt the butter and sauté the garlic for about 30 seconds, just until fragrant.
- Stir in the heavy cream, milk, salt, pepper, and nutmeg. Heat gently until warm, being careful not to boil.
- Add the cheddar, mozzarella, provolone, and Parmesan cheeses, stirring continuously until the sauce is smooth and fully melted.
- Pour the cheese sauce evenly over the potatoes, gently pressing the potatoes down so they are well coated.
- Cover loosely with foil and bake for 35 minutes.
- Remove the foil and continue baking for an additional 15 minutes, or until the top is bubbly and lightly golden.
- Let the dish rest for 10 minutes before serving to allow the sauce to thicken.
Variations
- Add thinly sliced onions or shallots between the potato layers for extra depth of flavor.
- Substitute Gruyère for provolone for a more pronounced nutty note.
- Stir cooked bacon pieces into the sauce for a smoky, indulgent twist.
- Use Yukon Gold potatoes for a creamier texture and slightly buttery flavor.
Tips
- Slice the potatoes evenly to ensure uniform cooking; a mandoline works best.
- Avoid boiling the cream mixture, as high heat can cause the cheese to separate.
- For an extra-golden finish, place the dish under the broiler for 1 to 2 minutes at the end.
- These potatoes reheat well, making them a great make-ahead side for entertaining.