Baked Mac and Cheese Recipe America's Test Kitchen: Crispy Top, Gooey Core Mastery

America's Test Kitchen perfected this baked mac and cheese with a crispy golden top and gooey core that's become my go-to comfort food. The secret lies in a properly made roux and precise baking technique—no more dry, grainy mac and cheese here. After years of testing, I've simplified their method into a foolproof recipe that delivers restaurant-quality results every time.

What makes this recipe stand out is the balance between creamy sauce and crispy breadcrumb topping. We start with a classic roux base that prevents the cheese from separating, then layer it with perfectly cooked pasta and a blend of cheeses for depth.

The breadcrumbs add texture without overwhelming the rich, cheesy center.

By the time it emerges from the oven, you'll have a dish with a golden, shatteringly crispy top that contrasts beautifully with the velvety, stretchy cheese filling. This is comfort food at its finest—rich, indulgent, and impossible to resist. The best part? It's easier to make than you think.

Serve with a simple side salad or roasted vegetables to balance the richness. This recipe makes enough for a family of four, with leftovers that reheat beautifully. Let's get started on creating your perfect baked mac and cheese.

Ingredients for baked mac and cheese recipe america's test kitchen

Pantry staples meet restaurant-quality technique for this foolproof baked mac and cheese.

The cheese selection makes all the difference. Sharp white cheddar gives that classic tang, while Gruyère adds nutty depth—don't substitute with pre-shredded blends (they contain anti-caking agents that prevent smooth melting). For the best quality, grab a block of each at Whole Foods or specialty grocery stores. Shred it yourself using the large holes on a box grater for even, meltable shreds. The Parmesan for the topping should be freshly grated too—pre-grated loses flavor fast. As for the butter, Plugrá or Land O'Lakes unsalted work perfectly for the roux, but avoid salted varieties here.

No Gruyère? Comté or extra-sharp cheddar will work in a pinch, though the flavor profile shifts slightly. Short on heavy cream? Half-and-half with an extra splash of milk keeps it creamy. The mustard is non-negotiable—it adds subtle tang that balances the richness. Dijon mustard has more depth than basic yellow, but either works. For the breadcrumbs, Panko stays crispy while regular breadcrumbs get soggy. Want extra crisp? Toast the panko in a dry pan for 2-3 minutes before mixing with Parmesan. The garlic cloves can be pre-minced from a jar if you're short on time, but fresh always tastes better.

This reheats beautifully—just cover with foil and bake at 375°F for 15-20 minutes. Keeps for 4-5 days in the fridge, though I rarely let it last that long. For make-ahead prep, assemble everything up to the baking step, then refrigerate for up to 24 hours before baking. The sauce will firm up slightly but comes together perfectly in the oven. Portion into individual baking dishes for easy leftovers—each serving reheats perfectly for lunches.

Step-by-step instructions for crispy baked mac and cheese

Master the perfect balance of crispy topping and gooey center with these precise techniques.

Bring a large pot of water to a rolling boil and add 12 oz elbow macaroni. Cook until 1 minute before the package directions specify for al dente. This slight undercooking prevents mushiness when baked. Drain immediately and transfer to a large bowl.

Reserve 1 cup of the starchy pasta water—this liquid is essential for creating a silky sauce. I keep a measuring cup nearby so I don't forget this crucial step. The starch helps emulsify the cheese mixture for a velvety texture.

In a separate pot, melt 0.5 cup unsalted butter over medium heat. Whisk in 0.5 cup all-purpose flour to form a roux, cooking for 2 minutes until golden and bubbly. This creates the foundation for our rich sauce.

Gradually whisk in 0.5 cup warmed whole milk and 1 cup heavy cream until smooth. Add 3 cups sharp white cheddar cheese and 1 cup gruyère cheese in batches, stirring constantly until fully melted. Remove from heat and stir in 1 tbsp yellow mustard, 1 tsp salt, 0.5 tsp black pepper, and 0.25 tsp nutmeg.

Pour the cheese sauce over the cooked macaroni and stir vigorously until every strand is coated. If the mixture looks too thick, add 2-3 tablespoons of the reserved pasta water to reach a smooth, pourable consistency. The sauce should cling to the pasta without being watery.

Transfer the macaroni mixture to a 9x13-inch baking dish, spreading it evenly. The dish should be about ¾ full—this allows room for the crispy topping without overflowing. Press down gently to compact the mixture slightly.

In a small bowl, combine 0.75 cup panko breadcrumbs, 0.25 cup freshly grated parmesan cheese, 2 minced garlic cloves, 1 tbsp melted butter, 0.5 tsp salt, and 0.25 tsp black pepper. Sprinkle this mixture evenly over the macaroni, pressing down lightly to ensure good contact with the sauce.

For extra crispiness, I like to make small crisscross patterns with a fork in the topping before baking. This creates more surface area for browning while maintaining the structural integrity of the crust.

Preheat your oven to 375°F and bake the macaroni for 25-30 minutes until the edges are deep golden brown and the topping is crispy. The center should still be slightly underdone—it will finish cooking as it rests.

For the crispiest results, I recommend broiling for 1-2 minutes at the end if your oven supports it. Watch closely to prevent burning. Let the macaroni rest for 10 minutes before serving—this allows the cheese to set slightly and makes cutting easier.

Common mistakes when making your baked mac and cheese recipe america's test kitchen

Overcooking the Pasta

I’ve ruined more mac and cheese than I care to admit by overcooking the pasta. When you cook elbow macaroni to al dente (1 minute before package directions), it holds its shape beautifully during baking.

Overcooked pasta turns mushy when baked, destroying that perfect creamy texture. Always taste-test a piece—it should have a slight bite. Trust me, this one small step makes all the difference. 🍝

Skipping the Roux

The roux is the secret weapon in this recipe, yet many home cooks skip it or rush through it. Cooking 0.5 cup butter and 0.5 cup flour together for 2 minutes until golden creates the foundation for a smooth, velvety sauce.

Without it, your cheese sauce will either be too thin or separate. I’ve tested both ways—this method is non-negotiable for that restaurant-quality creaminess. 🧈

Cheese Separation

Nothing ruins a baked mac and cheese faster than oily cheese separation. The key is adding cheese gradually while stirring constantly, and using the right temperature. Warm the milk slightly before adding it to the roux, and melt the cheese over medium-low heat.

If your sauce starts looking oily, whisk in 1 tablespoon of reserved pasta water to bring it back together. I’ve learned this the hard way—patience is everything here. 🧀

Uneven Baking

Baking this dish at 375°F is crucial, but many ovens have hot spots that create uneven browning. Rotate your baking dish halfway through the 25-30 minute bake to ensure even cooking. For extra insurance, I place my dish on the middle rack where heat circulates most evenly.

If your oven runs hot, reduce the temperature to 350°F and bake for an extra 5-10 minutes. 🌡️

Soggy Topping

The breadcrumb topping is what makes this dish shine, but it’s easy to mess up. Using panko breadcrumbs instead of regular breadcrumbs prevents sogginess, but you still need to press it lightly onto the sauce before baking.

I also recommend toasting the panko in a dry pan for 2-3 minutes before mixing it with Parmesan—this adds extra crispiness. Never skip pressing it down; otherwise, it’ll turn into a sad, mushy mess. 🍞

Not Resting Before Serving

This is one of those "I know better but still do it wrong" mistakes. Pulling freshly baked mac and cheese from the oven and diving in immediately leads to a runny, unappetizing mess.

Let it rest for 10 minutes—this allows the cheese to set slightly and the sauce to thicken. The first time I skipped this step, I ended up with a cheese volcano on my plate. Now I religiously wait those 10 minutes. 🕒

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