Side Dishes
Emeril Lagasse's scalloped potatoes with onions bring restaurant-quality comfort to your dinner table in just one pan. The secret lies in perfectly layered thin slices that bake into creamy, crispy perfection with a golden top that cracks like fine porcelain.
I've refined this technique over years of testing—balancing rich dairy with sharp onions and crispy edges that hold their shape until the very last bite.
This dish transforms humble ingredients into something extraordinary through careful layering and precise baking. Thinly sliced potatoes and onions create a satisfying texture contrast—tender, creamy centers with crispy, caramelized edges.
The key is patience in the layering process and maintaining a consistent temperature throughout baking to achieve that signature crispy top without burning.
What you'll end up with is a side dish that's rich enough to stand alongside steak but light enough to complement grilled fish. The onions add sweetness that caramelizes beautifully, while the cheese creates that signature creamy sauce that makes every bite irresistible.
This is the kind of dish that disappears faster than it's served—perfect for family dinners or special occasions.
The beauty of this recipe is its versatility—you can adjust the cheese blend to your preference or add herbs for extra flavor. Whether you're serving it as a side or making it the star of the meal, this scalloped potatoes and onions recipe delivers restaurant-quality results with minimal effort.
Let's get started on creating this one-pan masterpiece.
Ingredients for emeril's scalloped potatoes onions
Thinly sliced potatoes and onions transform into restaurant-quality comfort with just twelve ingredients.
| Ingredient | Amount | Notes |
|---|---|---|
| Russet Potatoes 🥔 | 2 ½ lbs | Thinly sliced, peeled preferred |
| Yellow Onions 🧅 | 1 ½ lbs | Thinly sliced, yellow or sweet |
| Heavy Cream 🥛 | 2 cups | Full-fat for richness |
| Sharp Cheddar Cheese 🧀 | 1 ½ cups | Shredded, aged preferred |
| Gruyère Cheese 🧀 | ½ cup | Shredded, nutty flavor |
| Unsalted Butter 🧈 | ½ cup | Cold, cubed for layering |
| All-Purpose Flour 🌾 | ¼ cup | For roux base |
| Diamond Crystal Kosher Salt 🧂 | 1 ½ tsp | Fine grain preferred |
| Freshly Ground Black Pepper 🌶️ | ½ tsp | Freshly cracked preferred |
| Garlic Cloves 🧄 | 4 cloves | Minced, for depth |
| Fresh Thyme Leaves 🌿 | ¼ cup | Chopped, optional garnish |
| Whole Milk 🥛 | ½ cup | For creaminess |
The potatoes are non-negotiable—Russets have the right starch for that creamy texture. Grab the 2.5-pound bag at Whole Foods or your local market; they're usually pre-washed and ready to slice. If you're feeling fancy, organic Russets from a farmers market have even better flavor, but regular ones work just fine. For the onions, yellow or sweet varieties caramelize beautifully—avoid red if you want that classic golden hue. I always slice them 1/8-inch thick using a mandoline for perfect evenness, but a sharp knife works too if you're patient. The key is to slice them all the same thickness so they cook evenly.
No heavy cream? Half-and-half mixed with whole milk gets you close, though you'll lose a bit of richness. Sharp cheddar is essential for that tangy bite, but Pepper Jack or Gouda work in a pinch if that's what you've got. Gruyère adds depth—if you can't find it, Swiss cheese works too. The butter should be cold and cubed when you layer it; this prevents the potatoes from getting soggy. For the garlic, fresh is non-negotiable—jarred minced garlic has no flavor. Fresh thyme is ideal, but dried thyme at half the amount will work if you're out. The flour needs to be all-purpose; cake flour won't give you the same roux texture. And for the love of all things crispy, Diamond Crystal kosher salt—the flaky texture matters here.
This dish reheats beautifully—350°F for 15-20 minutes until bubbly. Store leftovers covered in the fridge for up to 4 days, though I've never had any last that long. The secret to crispy edges? Don't skip the final 5 minutes of broiling—that's when the magic happens. For make-ahead prep, assemble the dish in a baking dish, cover with foil, and refrigerate for up to 24 hours before baking. The flavors actually improve overnight. And if you're serving it as the main? Add a protein like grilled chicken or shrimp on top—it soaks up that creamy goodness like a dream.
Why You'll Love This Recipe
- One-Pan Magic: I swear by this recipe when I’m too tired to scrub pots—just slice, layer, and bake. The onions caramelize right into the creamy cheese sauce, so you’re basically getting two sides in one dish.
- Creamy Cheese Obsession: That combo of sharp cheddar and Gruyère? It’s like a hug for your taste buds. The heavy cream makes it rich but not heavy, and the golden top layer? Worth every calorie.
- Weeknight Hero: Honestly, this is my go-to when I need something hearty but low-stress. It reheats beautifully for lunch the next day, and the leftovers? Even better cold in sandwiches.
- Budget Buster: Russets and onions are cheap, and a little cheese goes a long way. I stretch this for four meals—two dinners, two lunches—without breaking the bank. Plus, it feels fancy enough for company.
Step-by-step instructions for emeril's scalloped potatoes and onions
Here's how to build layers of golden, crispy onions and tender potatoes in a velvety cheese sauce.
Prepare the Potatoes and Onions for Layering
Begin by peeling the 2.5 lbs russet potatoes and thinly slicing them using a mandoline or sharp knife—aim for ⅛-inch thick slices. The thinner they are, the quicker they'll cook and the more evenly crispy they'll become. Toss the potato slices with 1 teaspoon of the diamond crystal kosher salt and set aside.
Next, thinly slice the 1.5 lbs yellow onions into ⅛-inch rounds. Soak them in ice water for 5 minutes to mellow their sharpness, then drain and pat dry. This step prevents the onions from becoming bitter as they cook. Keep both the potatoes and onions separate until you're ready to assemble the dish.
Create the Creamy Cheese Sauce
In a medium saucepan, melt the 0.5 cup unsalted butter over medium heat. Once melted, whisk in the 0.25 cup all-purpose flour to form a roux. Cook for 2-3 minutes until it turns a pale golden color—this removes the raw flour taste and thickens the sauce properly.
Slowly pour in the 0.5 cup whole milk while whisking constantly to prevent lumps. Let the mixture simmer for 2 minutes until slightly thickened. Then, reduce the heat to low and gradually whisk in the 2 cups heavy cream, followed by the 1.5 cups sharp cheddar cheese and 0.5 cup gruyère cheese. Stir until the cheeses melt completely and the sauce is smooth. Season with the remaining 0.5 teaspoon diamond crystal kosher salt and 0.5 teaspoon freshly ground black pepper. Remove from heat and set aside.
Assemble the Layers in a Baking Dish
Preheat your oven to 375°F. In a 9x13-inch baking dish, spread a thin layer of the cheese sauce on the bottom to prevent sticking. Arrange a single layer of potato slices in an overlapping pattern, slightly offset like brickwork. This ensures even cooking and maximum crispiness.
Sprinkle half of the sliced onions over the potatoes, followed by another thin layer of cheese sauce. Repeat with another layer of potatoes, the remaining onions, and a final layer of sauce. The onions should peek through the top layer slightly—this guarantees they crisp up beautifully. Press down gently to help the layers adhere.
Bake Until Golden and Bubbly
Cover the baking dish tightly with aluminum foil and bake for 45 minutes. This initial covered phase allows the potatoes to soften without over-browning. After 45 minutes, remove the foil and increase the oven temperature to 400°F. Return the dish to the oven and bake for another 20-25 minutes until the top is deep golden brown and the edges are bubbling.
Here's where the magic happens: the onions should be caramelized and crispy on top while the potatoes remain tender underneath. If the top browns too quickly, tent it loosely with foil for the last 5 minutes to prevent burning. The dish is done when the center is still slightly jiggly—it will firm up as it rests.
Rest and Garnish for Maximum Flavor
Let the scalloped potatoes rest for 10-15 minutes before serving. This resting period allows the layers to set and the flavors to meld. The cheese sauce will thicken slightly, coating every bite in that creamy, cheesy goodness.
Before serving, sprinkle the 0.25 cup chopped fresh thyme leaves and the 4 minced garlic cloves over the top for a burst of aromatic freshness. The thyme adds a bright, herbal note that cuts through the richness, while the garlic enhances the depth of flavor. Serve warm, straight from the oven, with a side of crusty bread to soak up every last bit of that luscious sauce.
Pro Tips For Making Emeril'S Scalloped Potatoes Onions
- PRECOOK POTATOES SLIGHTLY: After peeling and slicing those Russets, give them a quick 2-minute blanch in boiling salted water before layering. I learned this the hard way—raw slices release too much starch and turn gluey. A light cook firms them up while keeping the texture creamy, not mushy.
- GRATE ONIONS FINE: Skip the chunky dice—use a box grater for onions, aiming for the consistency of wet sand. This ensures even distribution and melts smoothly into the cream, rather than sitting as separate bits. (Yes, it’s tedious, but your future self will notice the difference.)
- DON’T OVERMIX THE CREAM: Once you fold in the heavy cream, stir just until combined—no need to whip it into submission. Overmixing incorporates too much air, which can make the top layer of cheese puff up unevenly. Think "gentle marriage," not "blender mode."
- USE ROOM-TEMP CHEESE: Take the cheddar and Gruyère out of the fridge 30 minutes before layering. Cold cheese melts poorly and creates clumps, while room-temperature cheese blends seamlessly into the creamy base. (Pro move: shred it yourself—pre-shredded cheese has anti-caking agents that ruin texture.)
Best sauces and condiments for this dish
Creamy Garlic Sauce
Emeril's signature sauce elevates this dish with a rich, velvety texture. Start by melting ½ cup unsalted butter in a saucepan, then whisk in ¼ cup all-purpose flour to create a roux. Cook for 2-3 minutes until golden, then slowly add ½ cup whole milk to prevent lumps.
After thickening, reduce heat and stir in 2 cups heavy cream, 1.5 cups sharp cheddar, and ½ cup gruyère until completely melted. Finish with ½ tsp salt and ½ tsp black pepper.
This sauce is the heart of the dish—it should coat the back of a spoon when done. 🧈
Caramelized Onion Topping
For extra depth, prepare a separate caramelized onion topping by cooking 1.5 lbs thinly sliced yellow onions in 2 tbsp butter over low heat for 30-40 minutes until deep golden brown.
Stir in 1 tbsp brown sugar and 1 tsp balsamic vinegar in the last 5 minutes for a sweet-tangy finish. Spread this over the top layer of potatoes before baking for a restaurant-quality crunch. 🧅
Herb-Infused Cheese Sauce
Take the classic sauce to the next level by infusing it with fresh herbs. After melting the cheeses, stir in 1 tbsp chopped fresh thyme and 1 tsp minced garlic while off the heat.
For a smoky twist, add ½ tsp smoked paprika to the roux. This herbaceous version pairs beautifully with grilled meats or roasted vegetables. The thyme adds brightness that cuts through the richness. 🌿
Spicy Kick with Jalapeños
Add heat by mixing 2-3 thinly sliced jalapeños into the top layer of onions before baking. For extra spice, remove seeds and membranes first. The jalapeños will soften slightly but retain their kick, balancing the creamy cheese.
Garnish with extra jalapeño slices after baking for a vibrant presentation. This variation works especially well with Mexican-inspired meals. 🌶️
Lighter Version with Greek Yogurt
Reduce the richness by replacing ½ cup of the heavy cream with ½ cup plain Greek yogurt in the sauce. The yogurt adds tanginess and creaminess while cutting calories. For extra flavor, mix in 1 tbsp lemon juice and an additional ½ tsp salt to compensate for the reduced dairy.
This lighter version maintains the creamy texture while being more diet-friendly. 💪
Balsamic Glaze Finish
Drizzle the finished dish with 2 tbsp reduced balsamic glaze before serving for a sweet-tangy contrast. Warm the glaze in a small saucepan for 2-3 minutes until slightly thickened, then carefully drizzle over the top.
The glaze adds visual appeal while complementing the caramelized onions and creamy sauce. This finishing touch elevates the dish to gourmet status. 🍷
Nutrition facts
Frequently asked questions
Why do the onions need to be soaked in ice water?
Soaking the onions in ice water for 5 minutes removes excess sharpness and prevents them from becoming bitter during baking. This step ensures they caramelize beautifully into sweet, crispy layers rather than overpowering the dish with raw onion flavor.
Can I use sweet potatoes instead of russets?
While possible, russet potatoes are ideal for their high starch content, which creates that signature creamy texture. Sweet potatoes will add natural sweetness and a different texture—more moist and less fluffy. If you prefer them, try reducing baking time by 10 minutes and check for doneness earlier.
What's the secret to getting that perfect crispy top?
The crispy top comes from two key steps: baking uncovered at 400°F for the final 20-25 minutes and ensuring onions peek through the top layer. For extra insurance, sprinkle 1 tablespoon breadcrumbs on top before the final bake. Don't overlook the 10-minute rest—it lets the layers set properly.
Can I make this dish ahead of time?
Assemble the dish in a baking dish, cover tightly with foil, and refrigerate for up to 24 hours before baking. The flavors actually improve overnight. When ready to bake, add 10-15 extra minutes to the total baking time since it starts cold. This make-ahead method saves time on busy days.
What if my dish isn't creamy enough?
If the sauce seems too thin, stir in 1-2 tablespoons cornstarch mixed with 1 tablespoon cold water and simmer for 2 minutes before serving. For extra richness, top with a dollop of sour cream or extra melted butter. The key is to avoid overbaking—the dish should be slightly jiggly in the center when done.