Creamy Smoked Potatoes Au Gratin Recipe

If you’ve been settling for plain baked potatoes on steak night, it’s time to elevate your dinner game. These creamy smoked potatoes au gratin are the ultimate indulgence, combining layers of tender potatoes, smoky flavors, and a luscious cheese sauce. This recipe is surprisingly simple, yet it yields an irresistible side dish that will leave everyone asking for seconds. Here’s how to make them step-by-step.

Creamy Smoked Potatoes Au Gratin

Ingredients You’ll Need
Before diving into the preparation, gather these ingredients for the best results:
For the Potatoes:
- 2 lbs of russet potatoes (about 4-5 medium-sized potatoes)
- 1 medium white onion
For the Sauce:
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cloves garlic, minced
- 2 ½ cups whole milk (divided)
- 1 teaspoon salt (or to taste)
- ½ teaspoon black pepper
- ½ teaspoon smoked paprika
For the Topping:
- 2 cups shredded sharp cheddar cheese
- ½ cup grated Parmesan cheese
Step-by-Step Instructions
1. Prepare the Potatoes and Onion
The key to a perfect potatoes au gratin is uniform slices. Start by:
- Slicing the Potatoes: Use a mandoline slicer for consistent ⅛-inch slices. If you’re using a knife, aim for thin, even slices to ensure they cook evenly.

- Slicing the Onion: Cut the onion into thin rings or slices, matching the thickness of the potatoes.

2. Layer the Dish
Choose a large cast-iron skillet, casserole dish, or any oven-safe baking dish for the perfect smoky flavor.
- Begin with a thin layer of onion slices, followed by a layer of potato slices.
- Repeat the layering process, alternating between onions and potatoes, until the dish is filled. Ensure the layers are even for consistent cooking.

3. Make the Creamy Sauce
The sauce is the star of this dish, providing richness and flavor. Here’s how to make it:
- In a medium saucepan over medium heat, melt the butter.
- Whisk in the flour to form a smooth roux. Cook for 1-2 minutes until the mixture is golden and fragrant.
- Add the minced garlic and cook for another 30 seconds.
- Slowly pour in 1 cup of milk while whisking constantly, ensuring there are no lumps.
- Season with salt, pepper, and smoked paprika.
- Gradually add the remaining 1 ½ cups of milk, whisking until the sauce thickens into a creamy consistency.

4. Assemble and Add Cheese
- Pour the creamy sauce evenly over the layered potatoes and onions, ensuring every layer is coated.

- Sprinkle the cheddar cheese and Parmesan over the top. The cheese will create a golden, bubbly crust as it cooks.

5. Smoke the Potatoes
The smoky flavor sets this dish apart from traditional au gratin recipes.

- Preheat your smoker to 300°F. If you don’t have a smoker, an oven will work as well, though you’ll miss out on that signature smoky depth.
- Place the dish on the smoker and cook for approximately 1 ½ hours, or until the potatoes are fork-tender, the sauce is bubbling, and the top is golden brown.

6. Serve and Enjoy
Allow the dish to rest for 5-10 minutes before serving. This helps the layers set and makes serving easier. Pair these creamy smoked potatoes au gratin with grilled steak, roast chicken, or even a simple salad for a complete meal.

Pro Tips for Success
- Choosing the Right Potatoes: Russet potatoes are ideal because of their high starch content, which helps create a creamy texture.
- Cheese Variations: Feel free to experiment with Gruyère, Monterey Jack, or smoked Gouda for added depth of flavor.
- Add Herbs: Sprinkle fresh thyme or chopped parsley over the top for a burst of freshness.
- Smoker Alternatives: If you’re using an oven, consider adding a dash of liquid smoke to the sauce for a hint of smokiness.
Why You’ll Love This Recipe
These creamy smoked potatoes au gratin are the perfect combination of indulgent and flavorful. The smoky aroma, creamy layers, and cheesy topping create a side dish that feels both comforting and gourmet. Whether you’re hosting a dinner party or looking to impress your family, this recipe is a surefire winner.
Frequently Asked Questions
Can I make this dish ahead of time?
Yes! You can prepare and assemble the dish up to the point of adding cheese. Cover it tightly with plastic wrap and refrigerate for up to 24 hours. When ready to cook, bring it to room temperature and proceed with smoking or baking.
What’s the best way to reheat leftovers?
Reheat in a 350°F oven for about 20 minutes, covered with foil to prevent drying out. For smaller portions, a microwave works as well.
Can I use different types of potatoes?
While russet potatoes are recommended, Yukon Gold potatoes are also a great choice for their buttery flavor and creamy texture.
By following this guide, you’ll master the art of creamy smoked potatoes au gratin and elevate any meal. Try this recipe, and let your taste buds revel in the smoky, cheesy goodness!