Emeril's Scalloped Potatoes and Onions Recipe: Crisp-Topped Layers With Herby Tang

Emeril Lagasse's scalloped potatoes with onions deliver that perfect balance of crispy golden tops and creamy, herby layers—just like your favorite restaurant's signature side dish. The secret lies in precise layering and a tangy, herb-infused cream sauce that transforms simple potatoes into something extraordinary.

I've replicated Emeril's technique after years of perfecting this dish, ensuring every bite delivers that satisfying crunch followed by velvety texture.

What sets this recipe apart is the combination of thinly sliced onions caramelized at the bottom, creating a flavorful base that infuses the entire dish. The potatoes are arranged in overlapping layers, allowing the sauce to penetrate deeply while developing that signature crispy top.

With just 30 minutes of prep and 45 minutes in the oven, you'll have a side dish that pairs beautifully with steak, chicken, or fish—ready to serve straight from the baking dish.

The herby tang comes from a blend of fresh parsley, chives, and a touch of Dijon mustard, which brightens the rich cream sauce. Each layer is seasoned with salt and pepper before baking, ensuring every bite is perfectly balanced.

The result is a dish that looks impressive yet requires minimal effort—a true restaurant-quality side that will become a staple in your meal rotations.

This recipe yields 6 servings, making it ideal for family dinners or gatherings. The leftovers reheat beautifully, maintaining that crispy top and creamy texture. Whether you're serving it alongside a holiday meal or a weeknight dinner, these scalloped potatoes will elevate any protein to centerpiece status.

Let's get started on creating this timeless classic.

Ingredients for emeril's scalloped potatoes onions

Six ingredients transform into Emeril's signature crispy-topped, herby scalloped potatoes with caramelized onions.

The potatoes are everything here—Russet is non-negotiable for that perfect texture. Grab the 3-pound bag from Whole Foods or your local market; they're usually pre-peeled for convenience. For onions, yellows caramelize best—Trader Joe's sells them pre-sliced if you're short on time. The key is thin, even slices: use a mandoline if you're feeling fancy, or hand-slice with a sharp knife. Fresh herbs matter too—parsley and chives from the grocery store's refrigerated section should look vibrant, not wilted. If you're prepping ahead, store the sliced potatoes in cold water (like fries) to keep them crisp.

No heavy cream? Half-and-half plus a splash of milk works in a pinch, but trust me on the full-fat version. Short on Dijon? Yellow mustard at double the amount gets you close. The butter should be cold and cubed—don't melt it first. For the garlic, roasted garlic adds sweetness if you prefer. The flour is just for thickening—no need to substitute here. And if you're watching calories, you can reduce the butter by half without sacrificing much crispiness. The onions? Caramelize them first—that's where the magic happens.

This reheats beautifully—just 10 minutes at 350°F with a sprinkle of milk to revive the crispy top. Keeps 4 days in the fridge, frozen for 3 months. I always make a double batch: one for dinner, one for lunches. The leftovers actually taste better the next day once everything melds. For serving, a quick broil for 2-3 minutes before eating gives that golden finish. And if you're feeling extra, garnish with extra chives and a crack of black pepper right before serving.

Step-by-step instructions for Emeril's scalloped potatoes and onions

Here's how to build layers of crispy, golden potatoes with caramelized onions and a velvety herby sauce.

Peel the 3 lb russet potatoes and slice them into ¼-inch thick rounds using a mandoline or sharp knife. I find the mandoline gives the most even slices, which is crucial for consistent cooking. Soak the sliced potatoes in cold water for 15 minutes to remove excess starch, then drain and pat thoroughly dry with paper towels. This step prevents gummy layers and ensures crispy edges.

Next, thinly slice the 2 large yellow onions into ⅛-inch thick rings. Spread them on a baking sheet and let them sit uncovered while you preheat the oven to 375°F. This drying process helps them caramelize more quickly and deeply. The onions should be completely dry before you layer them—any moisture will steam instead of brown.

In a 9x13-inch baking dish, begin by spreading half of the cold cubed unsalted butter evenly over the bottom. This creates a flavorful base that prevents sticking. Arrange a single layer of potato slices, slightly overlapping them, covering the entire bottom of the dish. Sprinkle with half of the minced 4 cloves garlic, half of the 1.5 tsp kosher salt, and half of the 0.5 tsp freshly ground black pepper.

Add the dried onion slices in an even layer over the potatoes, then repeat with another layer of potatoes, butter, remaining garlic, salt, and pepper. Finish with a final layer of potatoes, pressing down gently to ensure good contact between layers. This layering technique ensures every bite has both potato and caramelized onion. The butter will melt and create a luscious sauce as it bakes.

In a medium saucepan, melt the remaining 0.5 cup unsalted butter over medium heat. Whisk in the 2 tbsp all-purpose flour and cook for 1-2 minutes until it forms a smooth paste. Slowly pour in the 2 cups heavy cream and 0.5 cup whole milk, whisking constantly to prevent lumps. Add the 1 tbsp Dijon mustard, 0.25 cup chopped fresh parsley, and 2 tbsp finely chopped fresh chives, then simmer for 3-4 minutes until the sauce thickens enough to coat the back of a spoon.

Season with the remaining 0.5 tsp freshly ground black pepper and taste—adjust the salt if needed. The sauce should be rich but not overly thick; it will continue to thicken as it bakes. Pour this warm sauce evenly over the layered potatoes, making sure it seeps down between all the layers. This step is critical for that signature Emeril-style creaminess that binds everything together.

Transfer the baking dish to the preheated 375°F oven and bake uncovered for 45 minutes. After the initial 45 minutes, increase the oven temperature to 400°F and continue baking for another 20-25 minutes until the top is deep golden brown and the edges are crispy. You'll know it's ready when the cheese has formed a bubbly, caramelized crust and a knife inserted near the edge comes out clean.

Here's the thing—don't be tempted to peek or stir during baking. The potatoes need that steady, undisturbed heat to develop their signature crispy top and creamy interior. If the top browns too quickly, loosely tent it with aluminum foil for the last 10 minutes of baking to prevent over-browning while still allowing it to crisp.

Remove the dish from the oven and let it rest for 10-15 minutes before serving. This resting period allows the layers to set and the flavors to meld completely. The potatoes will be tender and the sauce will be perfectly thickened—not watery, not gluey, but just right. I like to sprinkle an additional 1 tbsp chopped fresh chives on top right before serving for that final pop of freshness.

Emeril's scalloped potatoes should have a crispy, golden crust on top, creamy layers throughout, and caramelized onions in every bite. The herby sauce should coat each forkful with a balance of tangy mustard, fresh herbs, and rich dairy. Serve immediately with a simple green salad or crusty bread to soak up every last bit of that luxurious sauce.

Best sauces and condiments for this dish

Herb-Infused Cream Sauce

The star of Emeril’s scalloped potatoes is that herb-infused cream sauce—where the Dijon mustard adds tang, fresh parsley brings brightness, and chives deliver a mild onion note.

I like to make a double batch of this sauce because it reheats beautifully and works as a base for other dishes like mashed potatoes or even a creamy pasta.

For extra depth, add 1 tsp smoked paprika to the sauce while simmering—it gives a subtle smokiness that pairs perfectly with the caramelized onions. 🌿

If you’re watching calories, substitute half the heavy cream with Greek yogurt—it keeps the tang but reduces fat. For a dairy-free version, use full-fat coconut milk and nutritional yeast for that cheesy, umami kick.

The key is to simmer the sauce just until it thickens—overcooking turns it gluey. I test it by dipping a spoon in; if it coats the back smoothly, it’s ready. 🥛

Caramelized Onion Jam

Emeril’s secret is those deeply caramelized onions at the bottom—sweet, jammy, and packed with flavor. To take it further, I sometimes make a quick onion jam by cooking the onions with 1 tbsp brown sugar and 1 tsp balsamic vinegar until they’re sticky and dark amber.

Spread this jam over the bottom layer of potatoes before adding the cream sauce for an extra layer of richness. Store-bought caramelized onions work in a pinch, but homemade always tastes better. 🧅

For a spicy kick, add ½ tsp cayenne pepper to the onions while caramelizing. If you love umami, stir in 1 tsp soy sauce at the end—it deepens the flavor without overpowering.

The onions should be soft and glossy before layering; if they’re still crunchy, cook them another 5-10 minutes until they break apart easily. 🌶️

Cheesy Variations

While Emeril’s original doesn’t call for cheese, adding sharp cheddar or Gruyère takes it to the next level. Sprinkle ½ cup shredded cheese over the top layer of potatoes before baking—it melts into a golden, bubbly crust.

For a baked potato vibe, mix ¼ cup sour cream into the cream sauce before pouring it over the potatoes. The acidity cuts through the richness beautifully. 🧀

For a vegan twist, use cashew cream (blend ½ cup soaked cashews with ½ cup water) and nutritional yeast for a cheesy flavor. The texture won’t be identical, but it’s a great dairy-free alternative.

If you’re feeling fancy, top with crispy fried shallots or toasted breadcrumbs for extra crunch. 🌱

Garlic Butter Glaze

Emeril’s dish is already garlicky, but I love adding a garlic butter glaze for extra richness. After baking, mix 2 tbsp melted butter with 1 minced garlic clove and ½ tsp lemon juice, then drizzle it over the top.

Broil for 2-3 minutes until golden and bubbly. This adds a luxurious finish that feels restaurant-worthy. For a spicy glaze, add ¼ tsp red pepper flakes to the butter mixture. 🧄

If you’re serving this as a holiday dish, swap the glaze for brown butter—its nutty depth pairs perfectly with the creamy potatoes. For a lighter option, use olive oil instead of butter and infuse it with roasted garlic for a Mediterranean twist.

The glaze should be thin enough to drizzle but thick enough to cling to the potatoes. 🍋

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