Some recipes taste like childhood. Some taste like home. And then there are those rare dishes that instantly bring back the warmth of family dinners, the laughter at the table, and the aroma that fills the house the moment the oven door opens. That’s exactly what Dad’s Creamy & Cheesy Au Gratin Potatoes deliver — timeless comfort, old-school richness, and the kind of flavor that only comes from a family recipe passed down with love.

This dish isn’t just creamy; it’s velvety. It’s not just cheesy; it’s layered with cheese at every turn. The potatoes melt in your mouth, the sauce is luscious and savory, and the cheesy golden crust on top is the kind you fight for.

This is the kind of recipe you make when you want to feed people deeply — holidays, Sunday dinners, celebrations, potlucks, or the kind of weeknight when everyone needs something warm and grounding.

Below is the full, expanded, indulgent recipe — written to be easy, approachable, and perfectly replicable.

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INGREDIENTS

For the Potatoes

• 3 pounds russet potatoes, peeled and thinly sliced
• 2 tablespoons butter (for greasing the dish)
• 1 medium onion, thinly sliced
• 2 cups shredded sharp cheddar cheese
• 1 cup shredded gruyere or Swiss cheese
• 2 tablespoons chopped fresh parsley (optional)

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For the Creamy Sauce

• 4 tablespoons butter
• 4 tablespoons flour
• 2 cups whole milk
• 1 cup heavy cream
• 1 teaspoon salt
• ½ teaspoon black pepper
• ½ teaspoon garlic powder
• ¼ teaspoon smoked paprika (optional)

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INSTRUCTIONS

Prepare the Base

1. Preheat oven to 375°F (190°C).
2. Lightly grease a large baking dish with 2 tablespoons butter.
3. Peel potatoes and slice thinly (⅛ inch thick preferred).
4. Slice onion into thin rings.

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Make the Cream Sauce

5. Melt 4 tablespoons butter in a saucepan.
6. Whisk in flour and cook 1 minute to form a roux.
7. Slowly pour in milk, whisking constantly.
8. Add heavy cream and reduce heat to low.
9. Season with salt, pepper, garlic powder, and smoked paprika.
10. Simmer 3–5 minutes until slightly thickened.

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Assemble the Dish

11. Layer half the potatoes in the baking dish.
12. Scatter half the onions over the potatoes.
13. Pour half the cream sauce evenly over the top.
14. Sprinkle half the cheddar and gruyere.
15. Repeat layers: potatoes → onions → sauce → cheese.

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Bake

16. Cover with foil and bake 45 minutes.
17. Remove foil and bake an additional 30–35 minutes until golden and bubbling.
18. Optional: broil 1–2 minutes for crispy edges.
19. Let rest 10 minutes before serving.

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Serving Suggestions

• Perfect with roasted chicken, ham, turkey, or steak
• Add cooked bacon for a smoky twist
• Serve with a green salad to cut the richness

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Storage

• Refrigerate up to 4 days
• Reheat in oven for best texture
• Freezes surprisingly well — reheat from frozen at 350°F

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