Make Truffle Mac And Cheese Recipe tonight: creamy truffle mac with crisp Parmesan-panko topping, ready in 50 minutes.
Preheat the oven to 375°F (190°C) and lightly grease a 9×13-inch rectangular baking dish with a dab of butter or a neutral cooking spray; set the pan aside on the marble so it’s ready when the assembled mac arrives. Keep everything tidy and close at hand—the baking dish’s clean rectangular silhouette will be important later, so place it openly on the surface and let it sit while you move through the saucing and assembly steps.
Bring a large pot of well-salted water to a boil and cook the elbow macaroni or cavatappi until just shy of al dente (about 1–2 minutes less than package directions). Drain thoroughly, shake the colander to remove excess water, and transfer the warm pasta to a large mixing bowl so the pieces remain separate and glossy, ready to receive the sauce. Stir the pasta once or twice to avoid clumps and to keep the texture light and slightly springy.

Melt butter in a heavy-bottomed saucepan, briefly sweat the minced garlic until fragrant, then sprinkle in the flour and whisk constantly to form a pale, foamy roux. While whisking, stream in room-temperature whole milk and heavy cream until the mixture becomes a smooth milky base. Keep the heat gentle—the goal is a silky emulsified liquid that will thicken slowly, not a boil. This is the tactile transformation from opaque milk to the first signs of cream-thickened sauce.

Bring the milk-cream mixture to a gentle simmer until it thickens enough to coat the back of a spoon, then reduce to low and stir in Dijon, salt, pepper, smoked paprika (if using), and a whisper of nutmeg so the aromatics bloom. Off the heat or on low, add the grated Gruyère, sharp white cheddar, and a portion of the finely grated Parmesan in small handfuls, whisking after each addition until the sauce is glossy, velvety, and perfectly smooth. Finish by stirring in 2 teaspoons of truffle oil, taste and adjust carefully—truffle should be perfumed, not overbearing.

Fold the drained pasta into the warm cheese sauce with a spatula until every piece is evenly coated; the mixture should look slightly looser than the finished bake, with visible ribbons of melted cheese and tiny pools of truffle oil. Spread the sauced pasta into the greased 9×13-inch rectangular baking dish and smooth the top into an even layer, keeping the dish’s clean geometry intact. Wipe the rim, position the spatula on the dish, and get ready for the crunchy topping.

Toss panko breadcrumbs with melted butter, the remaining grated Parmesan, and chopped fresh thyme (or parsley) until the crumbs look slightly damp and clumpy. Sprinkle the topping in an even, thin layer across the entire surface of the assembled mac. Bake in the preheated oven until the edges bubble and the crumb topping becomes a deep golden brown and crisp; let the casserole rest 5–10 minutes so the sauce firms slightly. Just before serving, scatter finely chopped chives or parsley and, if desired, finish with a few tiny drops of truffle oil for an aromatic lift.
