Arby's White Cheddar Mac and Cheese Recipe: Bistro-Style Crispy Breadcrumbs and Sharp Cheddar Fusion

This Arby's white cheddar mac and cheese recipe delivers the same velvety, sharp cheddar perfection you crave—just like the bistro-style version. The secret lies in a slow-cooked roux that creates a rich, creamy sauce without lumps, paired with crispy breadcrumbs that add texture.

After years of perfecting this dish, I’ve cracked the code to replicate that signature restaurant flavor at home.

The foundation starts with a proper roux—cooked low and slow until it reaches a deep golden hue. Sharp white cheddar melts into this base, creating a sauce so smooth it coats every noodle without breaking.

The breadcrumbs, toasted to a perfect golden brown, add a satisfying crunch that contrasts beautifully with the creamy filling. This isn’t just mac and cheese; it’s a restaurant-quality dish that’s foolproof for weeknight dinners.

What you’ll end up with is a bubbling, golden dish that’s crispy on top and creamy inside, with a sharp cheddar flavor that lingers. The breadcrumb topping stays crunchy even after baking, while the pasta absorbs the sauce perfectly.

It’s the kind of meal that feels indulgent but comes together in one pot—no fancy techniques required.

Serve this mac and cheese as a main dish or a side for holiday gatherings. The leftovers reheat beautifully, making it perfect for meal prep. Let’s get started on recreating this bistro classic at home.

Ingredients for arby's white cheddar mac and cheese

Six ingredients for the creamy base, five for the crispy topping—all you need for bistro-style perfection.

The cheddar is non-negotiable here. Sharp white cheddar from Cave Aged or Sapsucker Farm delivers that signature tang, but any good-quality block works—just shred it yourself. The butter matters too: Plugrá or Land O'Lakes unsalted melt smoothly, while store-brand butter can taste waxy. For the pasta, De Cecco or Barilla hold up best during baking. The breadcrumbs? Panko from Trader Joe's is my go-to—it stays crispy even after baking, but any panko will work. Pro tip: Toast the breadcrumbs in the oven first for extra crunch.

No sharp cheddar? Extra-sharp cheddar at half the amount plus a pinch of white vinegar mimics that tang. Running low on heavy cream? Full-fat Greek yogurt at the same quantity works in a pinch. The mustard is key for that subtle bite—Colman's or French's are reliable, but any dried mustard works. For the roux, don't rush it. Cook the butter and flour on low heat for at least 10 minutes until it's a deep golden brown. That's what gives the sauce its velvety texture. And if you're worried about lumps, whisk constantly or use a hand mixer.

This mac and cheese reheats beautifully—just cover with foil and warm in the oven at 350°F for 15 minutes. The breadcrumb topping stays crispy if you reheat it uncovered for the last 2 minutes. For meal prep, assemble the dish but skip baking until serving. Keeps in the fridge for 5 days or freezes for 3 months. I always make a double batch—one for dinner, one for lunches. The flavors deepen overnight, so leftovers are even better. Store in an airtight container, and save the breadcrumbs separately if you want extra-crispy topping later.

Step-by-step instructions for Arby's white cheddar mac and cheese

Here's how to recreate that signature crispy-topped, cheesy perfection at home.

Bring a large pot of water to a rolling boil and add 1.5 lbs elbow macaroni. Stir immediately to prevent sticking. Cook until 1 minute before the package directions specify for al dente—this ensures it finishes cooking in the cheese sauce without becoming mushy. I like to test a piece by biting into it—it should have a slight resistance but still be tender.

Reserve 1 cup of pasta water before draining. This starchy liquid is essential for creating a silky sauce. Drain the pasta in a colander and return it to the pot, tossing with 1 tablespoon of the unsalted butter to prevent clumping. Keep the pot warm over low heat while you prepare the cheese sauce.

In a large, heavy-bottomed saucepan, melt the remaining 0.5 cup unsalted butter over medium heat. Once melted, whisk in the 0.5 cup all-purpose flour to form a roux. Cook for 2-3 minutes, stirring constantly, until the mixture turns a pale golden color and smells nutty—this indicates the raw flour taste has cooked off.

Gradually whisk in the 2 cups whole milk and 0.5 cup heavy cream, adding just a splash at a time to prevent lumps. Return the mixture to a gentle simmer and cook for 5-7 minutes, stirring frequently, until it thickens enough to coat the back of a spoon. This is your velvety base sauce.

Lower the heat to low and begin adding the 3 cups sharp white cheddar cheese in batches, whisking vigorously after each addition. The cheese should melt smoothly into the sauce. If the mixture becomes too thick, add pasta water a few tablespoons at a time until it reaches a smooth, pourable consistency.

Once all the cheese is incorporated, stir in the 1 tsp dried mustard, 0.75 tsp diamond crystal kosher salt, and 0.25 tsp ground black pepper. Taste and adjust seasoning—you want the cheese to shine with its natural sharpness. Keep the sauce warm over low heat while you prepare the crispy breadcrumb topping.

Preheat your oven to 375°F. In a small bowl, combine the 1.5 cups panko breadcrumbs, 0.5 cup extra-sharp cheddar cheese, 0.5 tsp diamond crystal kosher salt, and 0.25 tsp ground black pepper. Drizzle in the 2 tbsp extra-virgin olive oil and mix until the breadcrumbs are evenly coated and clump together slightly.

Spread the breadcrumb mixture evenly over the top of the macaroni in the pot. The goal is to create an even layer that will crisp up beautifully. Place the pot in the preheated oven and bake for 8-10 minutes, until the breadcrumbs turn a deep golden brown and are crispy to the touch.

While the breadcrumbs crisp, heat a skillet over medium heat and add 2 tbsp unsalted butter. Once melted, add the diced yellow onion and cook for 5-6 minutes, stirring occasionally, until softened but not browned. Add the 4 cloves minced garlic and cook for 30 seconds until fragrant—don't let it burn, or it will turn bitter.

Transfer the macaroni to a large serving bowl and stir in the sautéed onion and garlic mixture. The crispy breadcrumb topping should stay intact on top. Serve immediately while the breadcrumbs are still crispy and the cheese is molten. The contrast of the creamy macaroni and crispy topping is what makes this dish truly special!

Troubleshooting great arby's white cheddar mac and cheese

Roux Gone Wrong

The most common issue is a lumpy roux, usually from cooking too fast or not whisking enough. I’ve ruined more sauces than I’d admit by rushing the roux—never let it brown too quickly.

Cook your butter and flour over medium-low heat for 10-15 minutes until it reaches a deep golden hue (like peanut butter). If lumps form, strain the sauce through a fine-mesh sieve or whisk vigorously with a hand mixer. 🌡️

Cheese Clumping

If your cheese sauce looks grainy instead of silky, you’re likely adding cheese too fast. Always melt cheese gradually over low heat, whisking constantly. For extra insurance, mix shredded cheese with 1-2 tablespoons of milk before adding it to the sauce.

If clumps persist, blend the sauce briefly in a blender or food processor—just don’t overdo it, or you’ll lose texture. 🧀

Breadcrumbs Too Soft

Soggy breadcrumbs ruin the whole dish! To prevent this, pre-toast the breadcrumbs in a dry skillet over medium heat for 2-3 minutes before mixing with cheese and oil. Also, bake the topping separately on a parchment-lined tray for 5-7 minutes at 375°F before sprinkling it on top.

This two-step method guarantees a crispy, golden finish every time. 🍞

Sauce Too Thin

A runny sauce usually means you didn’t cook the roux long enough or added too much liquid. To fix it, remove the pot from heat and let it cool slightly, then whisk in 1-2 tablespoons of flour mixed with 1 tablespoon of cold butter to thicken.

If that fails, simmer the sauce uncovered for 5-10 minutes to evaporate excess moisture. Pro tip: Always taste as you go—sharp cheddar should dominate, not milk. 🥛

Pasta Overcooked

Mushy pasta is a heartbreaker, but it’s easy to avoid. Cook your elbow macaroni 1 minute less than package instructions, then finish in the cheese sauce. For extra insurance, drain pasta and immediately toss with 1 tablespoon of butter to prevent sticking.

If it’s already too soft, mix in 1-2 tablespoons of flour to absorb excess moisture. 🍝

Burnt Breadcrumb Topping

Watch your oven like a hawk—375°F is critical for crispy, not burnt, breadcrumbs. If the topping darkens too quickly, reduce heat to 350°F and bake for 2-3 minutes longer.

For even browning, spread breadcrumbs in a single even layer on parchment paper before baking. A light golden color means success; black spots mean disaster. 🔥

Frequently asked questions about Arby's white cheddar mac and cheese