These Cheesy Garlic Scalloped Potatoes (Gratin Dauphinois) are the quintessential comfort food side dish! Thinly sliced tender Yukon Gold potatoes are layered in a rich, velvety garlic and fresh thyme cream sauce, smothered in a blend of nutty Gruyère and sharp Parmesan cheese, and baked until bubbling, golden brown, and heavenly.
Whether you’re planning a lavish Thanksgiving or Christmas holiday feast, a Sunday roast dinner, or simply craving the ultimate cozy potato gratin, this foolproof from-scratch recipe delivers restaurant-quality decadence with simple pantry staples!
Why You'll Love This Recipe
- Incomparably rich & creamy: Sliced potatoes simmer slowly in heavy cream, garlic, and butter until melt-in-your-mouth tender
- Crispy golden cheese crust: A blend of Gruyère and Parmesan melts into a bubbly, deeply caramelized golden gratin top
- No curdling guaranteed: Yukon Gold potatoes release natural starches that thicken the cream sauce into silky perfection
- The ultimate holiday side dish: Pairs effortlessly with prime rib, roast turkey, glazed ham, steak, or chicken!
If you love cozy, hearty dinner sides like our Chicken Wild Rice Casserole and our Crockpot French Onion Meatloaf, these creamy scalloped potatoes are an absolute must-make.
Key Ingredients & Smart Substitutions
Here are the simple ingredients you’ll need:
- Potatoes: 3 lbs Yukon Gold potatoes (thinly and uniformly sliced to 1/8-inch thickness using a mandoline or sharp chef’s knife; no peeling required!).
- Heavy Cream & Whole Milk: 1.5 cups heavy whipping cream and 1 cup whole milk (creates that signature luxurious gratin texture).
- Garlic: 5 cloves fresh garlic, minced or finely grated (infuses deep savory aroma throughout the sauce).
- Butter: 3 tablespoons unsalted butter.
- Fresh Thyme: 1 tablespoon fresh thyme leaves (plus extra whole sprigs for garnish).
- Cheeses: 1.5 cups freshly shredded Gruyère cheese (or sharp white cheddar) and 1/2 cup finely grated Parmigiano-Reggiano.
- Seasonings: 1 teaspoon kosher salt, 1/2 teaspoon freshly cracked black pepper, and a pinch of ground nutmeg.
How to Make Cheesy Garlic Scalloped Potatoes (Step-by-Step)
1. Infuse Garlic Cream Sauce: Preheat your oven to 375°F (190°C). In a medium saucepan over medium heat, melt the butter and sauté the minced garlic for 1 minute until fragrant. Whisk in the heavy cream, whole milk, fresh thyme, salt, black pepper, and ground nutmeg. Bring to a gentle simmer for 3 to 4 minutes to infuse flavors, then remove from heat.
2. Layer Sliced Potatoes: Butter a 9×13-inch (or oval 3-quart) ceramic baking dish. Arrange one-third of the thinly sliced Yukon Gold potatoes in neat, slightly overlapping rows across the bottom of the dish. Season with a light pinch of salt.
3. Pour Sauce & Add Cheeses: Pour one-third of the warm garlic cream sauce over the first potato layer and sprinkle with some shredded Gruyère. Repeat with the remaining potatoes and cream in two more layers. Finish by generously scattering the remaining Gruyère and Parmesan cheese over the entire top.
4. Bake, Rest & Serve: Cover tightly with aluminum foil and bake at 375°F (190°C) for 45 minutes. Uncover and bake for another 25 to 30 minutes until the potatoes are fork-tender and the cheese top is bubbling and deeply golden brown. Let rest for 15 minutes before serving to allow the sauce to set and thicken!
Chef's Secret for Ultra-Creamy Gratin
- Use a mandoline slicer: Uniform 1/8-inch slices ensure every potato slice cooks evenly at the exact same rate
- Do NOT rinse sliced potatoes: Potato starches are essential to naturally thicken the cream into a velvety gratin sauce without adding heavy flour roux!
- Let rest before serving: Resting 15 minutes allows the bubbling sauce to absorb into the hot potatoes for clean, creamy spoonfuls
Variations & Add-ins
- Crispy Bacon & Chives: Fold in 6 strips of cooked crumbled bacon and top with fresh chives.
- Caramelized Onion Layer: Add a layer of sweet caramelized yellow onions between the potato slices.
- Smoked Gouda Twist: Swap half of the Gruyère cheese for smoked Gouda for rich smoky flavor.
Storage & Make-Ahead Instructions
To Make Ahead: Assemble the casserole completely, cover tightly with foil, and refrigerate for up to 24 hours. Bake straight from the fridge, adding 10 extra minutes of covered baking time.
To Store: Store leftover scalloped potatoes in an airtight container in the refrigerator for up to 4 days.
To Reheat: Reheat covered in a 350°F oven for 20 minutes until heated through and bubbling.
Frequently Asked Questions
Can I use Russet potatoes instead of Yukon Gold?
Yes, Russet potatoes work well, but peel them first and expect a slightly fluffier, softer crumb.
What is the difference between scalloped and au gratin potatoes?
Scalloped potatoes are traditionally cooked in a cream sauce, while potatoes au gratin include grated cheese between layers and on top. This recipe combines the best of both worlds!
More Comforting Dinner Side Dishes to Savor Next
- Crockpot French Onion Meatloaf — Tender beef meatloaf smothered in melted Swiss and onion gravy.
- Chicken Wild Rice Casserole — Creamy baked casserole with tender chicken and cheddar.
- Creamy Chicken Stew — Rich Dutch oven chicken and vegetable stew.
Cheesy Garlic Scalloped Potatoes
- Total Time: 1 hour 35 minutes
- Yield: 8 servings 1x
Description
Cheesy garlic scalloped potatoes are a comforting classic that brings warmth and joy to any table. With layers of tender Yukon Gold potatoes enveloped in a creamy cheese sauce infused with fresh garlic, this dish promises indulgence in every bite. Perfect for family gatherings or cozy dinners, it’s not just a side; it’s the star of the meal!
Ingredients
- 3 lbs Yukon Gold potatoes, thinly sliced to 1/8-inch
- 1.5 cups heavy whipping cream
- 1 cup whole milk
- 5 cloves garlic, minced
- 3 tablespoons unsalted butter
- 1 tablespoon fresh thyme leaves
- 1.5 cups shredded Gruyère cheese
- 1/2 cup grated Parmigiano-Reggiano cheese
- 1 teaspoon kosher salt
- 1/2 teaspoon cracked black pepper
- Pinch of ground nutmeg
Instructions
- Infuse Cream Sauce: Preheat oven to 375°F (190°C). Sauté minced garlic in butter for 1 minute. Whisk in heavy cream, milk, thyme, salt, pepper, and nutmeg. Simmer 3 minutes.
- Layer Potatoes: Butter a 9×13-inch baking dish. Arrange one-third of sliced potatoes in overlapping rows.
- Add Sauce & Cheese: Pour cream sauce over potatoes and sprinkle with Gruyère. Repeat for 3 layers, finishing with remaining Gruyère and Parmesan on top.
- Bake, Rest & Serve: Cover with foil and bake at 375°F for 45 minutes. Uncover and bake 25 to 30 minutes until golden and bubbling. Rest 15 minutes, garnish with thyme, and enjoy!
- Prep Time: 20 minutes
- Cook Time: 1 hour 15 minutes
- Category: Side
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 cup (approximately 200g)
- Calories: 350
- Sugar: 2g
- Sodium: 450mg
- Fat: 25g
- Saturated Fat: 15g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 30g
- Fiber: 3g
- Protein: 8g
- Cholesterol: 75mg
Mueller 10-in-1 Vegetable Chopper – Slice, Dice & Mince Effortlessly! 
