Introduction
Creamy Roasted Garlic Potatoes au Gratin is a timeless side dish that elevates any table, from weeknight dinners to holiday spreads. The beauty of this recipe lies in the simple combination of thinly sliced potatoes bathed in a velvety cream sauce, enriched with roasted garlic and a generous melt of cheese. When the garlic is roasted, its mild sweetness seeps into the sauce, creating a warm, inviting aroma that fills the kitchen as it bakes. The potatoes become knife-tender as they simmer in the rich liquid, while the top layer develops a bubbling, caramelized crust that offers a satisfying crunch with every bite. This dish pairs beautifully with roasted meats, sautéed greens, or a crisp salad, making it a versatile addition to any menu. The technique is approachable: even slices ensure uniform cooking, and a slow bake allows flavors to mingle without scorching. For those who adore comfort food, this gratin delivers a lush, indulgent finish without feeling heavy when served in moderate portions. You can customize the cheese blend to suit your taste—Gruyère brings nutty depth, Cheddar adds brightness, and a touch of Parmesan can deepen the savory edge. With a little planning, you can prepare the roasted garlic ahead of time, assemble the gratin when guests arrive, and enjoy a restaurant-worthy dish in the comfort of your own kitchen.
Gathering Ingredients
Gathering the right ingredients is the first step toward a silky, flavorful gratin. For the base, select starchy potatoes such as Yukon Gold or Russet, about 2 pounds (about 900–1000 g). These varieties hold up well when sliced thin and cooked in cream without turning mushy. For the dairy, you’ll want about 2 cups of heavy cream to create a lush coating that clings to every potato slice, plus 2 tablespoons of butter to enrich the sauce. Roast garlic to a soft, caramelized sweetness, using 1–2 heads of garlic depending on how prominent you want the garlic note; the cloves should be tender, not prickly, so you get a mellow bite rather than acrid tang. Cheese is the star here: a cup of shredded Gruyère for its nutty melt and a cup of shredded sharp Cheddar for color and bite. A pinch of salt, black pepper, and a pinch of grated nutmeg heighten the flavors, while fresh thyme or chives offer a fragrant finish. Optional extras include a light sprinkle of breadcrumbs or a touch more cheese on top for extra crust. Have parchment or silicone liner ready, as well as a baking dish large enough to hold an even, layered stack. If you’re serving gluten-free guests, use gluten-free breadcrumbs or skip them altogether. This section sets up a flavorful foundation for the creamy layers that follow.
Prep and Slicing Potatoes
Prepare the potatoes by scrubbing them clean. If you prefer a thinner, more fork-tender finish, you can peel them, but leaving a little skin on adds texture and color. Slice the potatoes as evenly as possible, aiming for about 1/8 inch (3 mm) thickness. A mandoline slicer is ideal for uniform rounds, but a sharp knife works just fine if you handle it carefully. After slicing, rinse the potatoes briefly to remove excess starch, then pat dry thoroughly. This step helps prevent the slices from sticking together and ensures the sauce penetrates evenly. Preheat the oven to 375–400°F (190–200°C). In a small saucepan, warm the cream with a few pinches of salt, pepper, and a roasted garlic puree or minced roasted garlic, just until it’s steaming but not boiling. This pre-warmed cream will mix smoothly with the cheese later and reduce the baking time. If you like a hint of brightness, add a teaspoon of fresh thyme leaves. Keep the sliced potatoes in a bowl of cold water while you finish slicing to prevent browning. Drain and pat dry again just before layering to ensure the surface isn’t waterlogged. With the potatoes prepared and the cream seasoned, you’re ready to assemble the gratin layers.
Cream Sauce and Seasoning
In a pan, combine the warmed cream with a tablespoon of butter, letting it melt gently. Add the roasted garlic, a pinch of salt, pepper, and a light grating of nutmeg. Simmer for 5–8 minutes to let the flavors mingle and the cream lightly thicken. The goal is a luxuriously pourable sauce that clings to the potatoes but doesn’t pool heavily. If you want a richer finish, whisk in an extra splash of cream or a handful of shredded cheese toward the end, allowing it to melt into the sauce for a smoother texture. Taste and adjust seasoning. This sauce is your flavor carrier, so don’t skip the roasted garlic, which delivers a gentle sweetness that balances the richness of the dairy. When the sauce is ready, keep it warm on low heat while you assemble the gratin. The combination of garlic, cream, and cheese creates a harmonious foundation that will fuse during baking and yield a cohesive, creamy bake rather than separate layers. For a slightly lighter version, you can replace part of the cream with skim milk and add a touch of cornstarch slurry to thicken, but expect a less luscious finish. Once assembled, the gratin will bake into a unified, comforting dish with a golden top and a creamy interior.
Assembly, Layering, and Baking
Pattern the layers carefully to ensure even cooking and a beautiful finish. Start with a light coat of cream at the bottom of the dish, then arrange a single layer of potato slices in an overlapping pattern. Pour a portion of the garlic cream over the layer, then sprinkle a portion of the Gruyère and Cheddar mix. Repeat the process, finishing with a final layer of potatoes, the remaining cream, and a generous shower of cheese. Dot small pieces of butter across the top to promote browning, then cover the dish with foil. Bake in the preheated oven for 40–50 minutes, or until the potatoes are tender when pierced with a knife. Remove the foil and bake for an additional 10–15 minutes, or until the top is deeply golden and bubbling. If you like a crisper crust, place the dish under the broiler for 1–2 minutes at the end, keeping a close eye to avoid scorching. Resting the gratin for 10–15 minutes after removing from the oven allows the sauce to thicken and the flavors to settle, producing cleaner slices when served. This step is essential for achieving the right texture: creamy inside, with a golden and slightly crisp top. A properly baked gratin should pull apart into clean, creamy layers rather than mushy rows. Enjoy with a simple green salad or roasted vegetables for balance.
Cheese Options and How to Layer
The choice of cheese shapes the character of the gratin. Gruyère is a classic choice for its nutty melt and ability to form a glossy, cohesive sauce. Cheddar adds color and a sharper, more pronounced flavor. You can experiment with combinations such as Gruyère and Fontina for an ultra-smooth texture, or Parmesan for a more pronounced savory bite. A small amount of Asiago or provolone can introduce extra depth. The key is to distribute cheese in even layers so that every bite contains richness without overwhelming the potatoes. For a lighter variant, you can reduce the cheese by a third and rely more on the dairy in the cream. If you’re dairy-free, substitute with a thick coconut cream and a plant-based cheese that melts well, though the flavor will be noticeably different. Layering remains the same: create alternating layers of potatoes and cheese with a drizzle of the seasoned cream between each layer. The goal is a creamy interior with a gooey, golden crust on top. If you want extra crispness, sprinkle a tablespoon of breadcrumbs or a gluten-free alternative on the final layer, then bake until the top is beautifully browned. However you choose to do it, the cheese should melt completely and fuse with the cream to form a unified, indulgent dish.
Resting, Serving, and Storage
Let the gratin rest for 10–15 minutes after baking. Resting gives the sauce time to thicken and makes the slices easier to lift, which helps preserve the layered texture when serving. Cut into generous portions and garnish with a light scatter of fresh herbs such as thyme or chives for a pop of color. This dish pairs beautifully with roasted meats, steamed greens, or a bright citrus salad to cut through the richness. Leftovers can be stored in an airtight container in the refrigerator for up to 3–4 days. Reheat gently in a low oven or microwave, adding a splash of cream to revive the sauce if needed. For freezing, portion the gratin before baking and freeze unbaked in a sealed dish; bake from frozen, adding 15–20 minutes to the bake time. If you’re cooking for a crowd, you can scale the recipe by using a larger baking dish or preparing multiple smaller gratins. The flexibility of this recipe makes it ideal for holiday planning, potlucks, or comforting weeknight meals, always delivering a creamy, garlicky, cheesy finish that delights the senses and satisfies the appetite. Remember, the quality lies in the balance between potato tenderness, creaminess, and a well-browned top. When in doubt, bake a little longer for fully tender potatoes and a crust that crackles slightly under the bite.
Final Presentation and Leftovers
The final presentation should emphasize the gratin’s creamy texture and golden top. Slice portions cleanly to reveal distinct layers of potato, cream, and cheese. Serve with a bright green salad or roasted vegetables to create contrast on the plate and to balance richness with freshness. A light dusting of fresh thyme or parsley adds a pop of color and a fresh aroma. For table appeal, present the gratin in the same baking dish you cooked it in, or transfer to a warm serving platter to keep the remaining slices hot. If you’ve prepared more than your guests can eat, leftovers are best stored in the refrigerator, covered, for up to 3–4 days. Reheat gently to preserve the creamy texture, adding a splash of cream if necessary. This dish shines as a side but can also be paired with a simple protein for a comfortable, satisfying meal. The combination of roasted garlic, cream, and cheese makes for a memorable dish that still feels intimate and familiar, perfect for sharing with family and friends during any season. Enjoy the lingering aroma and the satisfying, melt-in-your-mouth finish of this Creamy Roasted Garlic Potatoes au Gratin as a comforting reminder that good food is about warmth, balance, and a little indulgence.
Creamy Roasted Garlic Potatoes au Gratin
Creamy roasted garlic potatoes au gratin with cheese and cream. Easy, comforting side dish perfect for family dinners and holidays.
total time
75
servings
4
calories
75 kcal
ingredients
- 900 g potatoes, thinly sliced 🥔
- 4 garlic cloves, roasted and mashed 🧄
- 240 ml heavy cream 🥛
- 150 g Gruyère cheese, grated 🧀
- 50 g Parmesan cheese, grated 🧀
- 2 tablespoons unsalted butter, melted 🧈
- 1 teaspoon fresh thyme leaves 🌿
- Salt to taste 🧂
- Black pepper to taste 🌶️
- Parsley for garnish 🌿
instructions
- Preheat the oven to 375°F (190°C). Lightly grease a baking dish with a bit of butter.
- Wrap the garlic cloves in foil with a splash of olive oil and roast for 25–30 minutes until very soft; let cool, then mash into a smooth paste.
- In a small bowl, whisk the heavy cream with the mashed roasted garlic, thyme, salt, and pepper.
- Layer a portion of the potato slices in the dish, drizzle with some of the cream mixture, and sprinkle with Gruyère and Parmesan. Repeat the layering until the dish is full, finishing with cheese on top.
- Cover the dish with foil and bake for 45–50 minutes, or until the potatoes are tender when pierced with a knife.
- Remove the foil and bake 10–15 minutes more, until the top is bubbling and golden browned.
- Let stand 5–10 minutes, then garnish with chopped parsley before serving.