Bonefish Grill Au Gratin Potatoes Recipe: Layers Of Cheesy Decadence

This dish brings restaurant-quality comfort to your home kitchen with its creamy, cheesy layers. I developed this version after years of perfecting the balance between tender potatoes and rich sauce.

The secret lies in thinly sliced potatoes and a velvety cheese sauce that bakes into golden, bubbling perfection. This side pairs beautifully with grilled meats or stands alone as a satisfying vegetarian option.

Ingredients for Bonefish Grill Au Gratin Potatoes

Creamy cheeses, fresh herbs, and tender potatoes make this dish unforgettable. Probably have most already.

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The potatoes are key here. Yukon Golds have the perfect texture—creamy but hold their shape. I grab mine from Whole Foods or any store with a good produce section. Look for firm potatoes with smooth skin (no green spots or sprouts). The cheeses? Freshly shredded blocks melt better than pre-shredded—less anti-caking agents means smoother sauce. Cabot or Tillamook are great for cheddar.

No Gruyere? Swiss cheese works in a pinch. Out of heavy cream? Half-and-half plus a tbsp of butter gets you close. Fresh thyme is ideal but dried at one-third the amount is fine. The mustard isn’t just for flavor—it helps emulsify the sauce. Don’t have Dijon? Whole grain mustard adds a nice texture (or skip it entirely, no big deal).

Assemble and bake right away, or refrigerate the assembled dish for up to 12 hours before baking. Leftovers keep 3-4 days in the fridge—reheat covered at 350°F until bubbly. Honestly, this tastes even better the next day (the flavors meld something magical).

Step-by-Step Instructions for Cheesy Au Gratin Potatoes

Here’s my foolproof method for creamy, bubbly perfection every single time.

Step 1: Slice and Par-Cook the Yukon Gold Potatoes

Using a sharp knife or mandoline, thinly slice the 2 lb Yukon Gold Potatoes into ⅛-inch thick rounds, leaving the skins on for texture. I like to soak the slices in cold water for 5 minutes to remove excess starch, then drain and pat dry thoroughly with a clean towel.

Place the potato slices in a large pot and cover with cold water. Bring to a boil over medium-high heat, then reduce to a simmer for 5 minutes. You want them to be just slightly tender but not fully cooked—they’ll finish in the oven. Drain carefully and set aside.

Step 2: Make the Creamy Cheese Sauce Base

In a large saucepan, melt 4 tbsp Unsalted Butter over medium heat. Add the 3 cloves minced Garlic Cloves and cook for 30 seconds until fragrant but not browned. Stir in the 4 tbsp All-Purpose Flour to create a roux and cook for 1-2 minutes until bubbly.

Slowly whisk in the 2 cups Whole Milk and 1 cup Heavy Cream until smooth. Cook for 3-4 minutes until the mixture thickens enough to coat the back of a spoon. Stir in the 1 tbsp Dijon Mustard, 1 tsp Salt, 0.5 tsp Black Pepper, and 0.25 tsp Nutmeg.

Step 3: Combine Potatoes and Sauce in Layers

Remove the sauce from heat and stir in 1½ cups of the Sharp Cheddar Cheese and all of the Gruyere Cheese until fully melted and smooth. This creates a rich, velvety base that will coat every potato slice beautifully.

In a greased 9×13-inch baking dish, create the first layer with half of the par-cooked potato slices, slightly overlapping them. Pour half of the cheese sauce evenly over the top. Repeat with the remaining potatoes and sauce, pressing down gently to ensure even coverage.

Step 4: Top with Remaining Cheese and Bake

Sprinkle the remaining ½ cup Sharp Cheddar Cheese and all of the 0.5 cup Parmesan Cheese evenly over the top. Dot with the remaining Unsalted Butter if you have any left from the original 4 tbsp.

Bake at 375°F for 25-30 minutes until the top is golden brown and bubbling around the edges. For extra browning, broil for 1-2 minutes at the end, watching closely to prevent burning.

Step 5: Rest and Garnish Before Serving

Let the dish rest for 10 minutes after removing from the oven. This allows the sauce to thicken slightly as it cools. The potatoes should be tender when pierced with a knife, and the top should have a beautiful golden crust.

Garnish with the 1 tbsp Fresh Thyme Leaves just before serving. The rest time ensures clean slices when serving, rather than a runny mess. This dish serves 4 as a generous side or 2 as a satisfying main.

Serving Suggestions for This Dish

Plating for Elegance

I serve these potatoes in the baking dish for a rustic look, but transferring to a white platter makes the golden top pop. Garnish with fresh thyme right before bringing to the table—I always pick mine from my garden for that vibrant green contrast.

Pair with Grilled Proteins

This dish shines alongside grilled steak or roasted chicken—the creamy texture balances smoky flavors beautifully. At my family cookouts, we’d serve it with hickory-smoked ribs for the ultimate comfort meal. 🔥

Vegetarian Centerpiece

For a meatless meal, add a crisp arugula salad with lemon vinaigrette. The peppery greens cut through the richness. I toss 4 cups arugula with 1 tbsp olive oil and a squeeze of lemon for brightness.

Bread for Soaking

Always include crusty bread to mop up every last bit of cheesy sauce. A warm baguette or sourdough roll works perfectly. My guests fight over the crispy edges and sauce-soaked bread pieces.

For extra flair, toast the bread with garlic butter before serving. ✨

Wine Pairing

A crisp Chardonnay or buttery Viognier complements the dish’s richness. I prefer a California Chardonnay with its balanced acidity. Avoid heavy reds that can overpower the cheese flavors.