This White Cheddar & Rosemary Potato Gratin is going to ROCK your holiday season tablescapes — trust me! It’s INCREDIBLE. But first…
I had the opportunity to spend time with some of the most incredible people in October, enjoying the bounty of Washington agriculture!
The first-ever Washington agriculture tour was such a joy to be a part of. We toured JK Dairy, Full Barn Ranch, Post 5 Cattle, and AgriNorthwest. We also spent time with Washington wine at Kiona Winery and were graciously hosted by the Browne family for two wonderful nights in the vineyard at their personal estate.
My heart will always belong to the hardworking men and women who grow and raise our food. Washington dairy is vital to just about everything I make here at Rustic Joyful Food. On the first evening, we had a meal to remember: Washington-grown potatoes and Washington-raised dairy went into some of the most delicious aged white cheddar au gratin potatoes I’ve ever had. I knew I had to recreate the recipe.
These potatoes are simple yet packed with flavor. I can’t wait for you to try them. They’ll be a fixture on your table this holiday season and beyond. And the next time you’re grocery shopping, take a moment to remember the hardworking farmers and ranchers who sacrifice 365 days a year to bring food to our tables.
Washington Dairy, under the thoughtful stewardship of the Washington Dairy Commission, represents the heart and backbone of family farming in our state—nearly 250 dedicated dairy farms working together to produce the rich, wholesome milk that fuels our communities. Their impact is profound: the dairy industry contributes $12.8 billion to Washington’s economy and supports nearly 19,000 direct jobs, while also reinforcing rural livelihoods and local supply chains. As the third-largest agricultural commodity in our state, Washington dairy embodies responsible farming, innovation, and sustainability—values that align beautifully with the spirit of Rustic Joyful Food. Supporting our dairy producers means celebrating a legacy of care, quality, and community that the Dairy Commission has championed for decades.
Why This Potato Gratin Recipe Works
This gratin is the kind of luxurious, deeply comforting side dish that feels elegant enough for holidays yet simple enough for any cozy dinner. Simmering the potatoes directly in cream infuses them with rich flavor, while cheddar adds sharpness and depth. The result is a perfectly tender, warmly aromatic gratin with golden edges and a silky interior. Here’s why it works every time:
- Tender, Cream-Infused Potatoes: Simmering the slices in cream before baking ensures every layer cooks evenly and absorbs maximum flavor.
- Balanced, Aromatic Flavor: Shallots and rosemary melt into the cream, giving the whole dish gentle herbal warmth without overpowering the potatoes.
- Rich, Cheesy Layers: Sharp cheddar melts into the potatoes as they cook, giving the gratin a velvety body and a golden, bubbly top.
- Even, Delicate Texture: Using a mandolin keeps every slice the same thickness, so the whole gratin bakes uniformly with no firm spots.
- Oven-Ready Simplicity: Everything comes together in one pot and one baking dish, making this a no-stress, reliably impressive side for gatherings or weeknight dinners.
If you made this recipe, please take a moment to rate it. I always ❤️ hearing from you.
Potato Gratin Ingredients
- Yukon Gold Potatoes – Naturally creamy and buttery, they hold their shape while becoming perfectly tender in the gratin.
- Heavy Cream – Creates a rich, silky base that soaks into the potatoes and delivers that classic luxurious texture.
- Sharp Cheddar – Adds depth, tang, and a golden, melty top that balances the richness of the cream.
- Shallots – Gently sweet and aromatic, they infuse the gratin with subtle flavor without overpowering the dish.
- Fresh Rosemary – Earthy and fragrant, it perfumes the cream and potatoes with warm, herbal notes that elevate every bite.
For full list of ingredients and instructions, see recipe card below.
Washington Cheeses To Try
Any of these Washington-local cheeses would SING in this potato gratin recipe:
- WSU Creamery Cougar Gold
- Beecher’s Handmade Cheese Flagship
- Golden Glen Creamery Cheddar
- TUNaWERTH Creamery Cheddar
Potato Gratin Instructions
- Prep the Oven: Preheat your oven to 350°F so it’s ready when your potatoes are layered and assembled.
- Slice the Potatoes: Wash and thinly slice the Yukon gold potatoes using a mandolin for even, delicate slices.
- Simmer the Potatoes: Place the sliced potatoes, heavy cream, shallots, rosemary, salt, and pepper in a large saucepan. Heat over medium until the mixture begins to simmer, then lower the heat and let it cook gently for 15–20 minutes.
- Prepare the Baking Dish: Brush 1 tablespoon of melted butter onto the bottom and sides of your 10-inch round baking dish.
- Layer the Gratin: Spoon one-third of the potatoes into the dish and sprinkle with one-third of the cheddar. Repeat for all layers, keeping the dish comfortably full without overflowing.
- Optional Alternate Dish: If using a 9×13 dish, create two even layers instead of three.
- Bake the Gratin: Place the dish on a sheet pan, then bake for 45–60 minutes, until the top is golden and bubbly and the potatoes are tender.
- Serve: Let the gratin rest briefly, then scoop and serve warm.
For full list of ingredients and instructions, see recipe card below.
Potato Gratin Substitutions & Variations
Here are some of my favorite substitutions and variations:
- Potato Varieties: Yukon Golds are perfect for a creamy, tender gratin, but russets, red potatoes, or fingerlings work beautifully too. Adjust cooking time if using firmer or smaller potatoes.
- Cheese Options: Sharp cheddar gives richness and tang, but Gruyère, fontina, or a blend of cheeses can create a more complex, melty topping.
- Herb Twists: Fresh rosemary is classic, but thyme, sage, or a little parsley can add subtle flavor changes.
- Cream Alternatives: Heavy cream can be swapped with half-and-half or whole milk for a lighter version; just expect a slightly less rich texture.
- Add-Ins: Sautéed onions, garlic, or a pinch of nutmeg can enhance the flavor, while crispy breadcrumbs on top add extra texture.
What to Serve with Potato Gratin
Main Dishes
- This gratin pairs beautifully with roasted or braised meats like chicken, pork, or beef, letting the rich, cheesy potatoes soak up all the savory juices.
- It’s also delicious alongside baked salmon or seared fish for a comforting, complete meal.
Sides
- Balance the richness with something bright and fresh, like a crisp green salad with a lemon vinaigrette or roasted seasonal vegetables.
- A simple sauté of garlic green beans or asparagus also works perfectly to add color, texture, and a light contrast to the creamy gratin.
Potato Gratin FAQs
Can I make this gratin ahead of time?
Absolutely! Assemble the gratin up to a day in advance, cover, and refrigerate. When ready to bake, add a few extra minutes to the baking time if it’s coming straight from the fridge.
Can I use a different type of potato?
Yes! Yukon Golds are ideal for a creamy texture, but russets, red potatoes, or fingerlings work beautifully too. Adjust cooking time slightly depending on the firmness of the potato.
Can I make it lighter or dairy-free?
For those with lactose intolerance, lactose-free whole milk is a great substitute! Cheddar cheese also has low lactose content, and aged cheddar has almost no lactose.
How should I store leftovers?
Let the gratin cool completely, then cover and refrigerate for up to 3 days. Reheat gently in the oven until warmed through to preserve the creamy texture.
Can I freeze this gratin?
Yes. Bake first, then let cool completely and freeze in an airtight container for up to 2 months. Reheat in the oven until hot and bubbly.
Not seeing your question here? Ask in the comments section and I’ll do my best to answer!
More Recipes You’ll Enjoy
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White Cheddar & Rosemary Potato Gratin
Equipment
- Large saucepan
- Mandolin or sharp knife
- Deep 10-inch round baking dish or 9×13 baking dish
- Cutting Board
- Oven-safe sheet pan
- Measuring Cups
- Cheese grater
Ingredients
- 7 medium Yukon gold potatoes thinly sliced
- 2 medium shallots peeled and quartered
- 2 cups heavy cream
- 2 sprigs fresh rosemary
- Salt & pepper to taste
- 2 tablespoons butter divided
- 2 1/2 cups freshly grated sharp white cheddar cheese
Instructions
- Preheat your oven to 350°F.
- Wash and thinly slice the potatoes using a mandolin or sharp knife.
- Add the sliced potatoes, heavy cream, shallots, rosemary, salt, and pepper to a large saucepan. Heat over medium until the mixture reaches a gentle simmer. Reduce heat to low.
- Simmer for 15–20 minutes, until the potatoes begin to soften. Remove from heat.
- Melt 1 tablespoon of butter and brush it onto the bottom and sides of a deep 10-inch round baking dish.
- Layer one-third of the potatoes into the dish, then sprinkle with one-third of the cheddar. Repeat for all three layers.
- Ensure the dish isn’t overly full.
- Alternatively, use a 9×13 baking dish and create two generous layers.
- Place the baking dish on a sheet pan to catch any drips.
- Bake for 45–60 minutes, or until the top is golden and the potatoes are tender. Serve warm.