01 -
First things first, get a big pot of water boiling. Add a generous amount of salt – think ocean water, honestly. Once it's bubbling, toss in your elbow macaroni. Cook it for about 2 minutes less than the package directions say. We want it al dente, maybe even a little undercooked, because it's going to finish cooking in the oven, and nobody wants mushy noodles in their Creamy Baked Mac and Cheese, right? Drain it well and set aside.
02 -
In a large saucepan or Dutch oven, melt your unsalted butter over medium heat. Once it’s all bubbly and melted, sprinkle in the all-purpose flour. Whisk constantly for about 1-2 minutes until it forms a smooth paste and starts to smell slightly nutty. This is your roux, the thickening agent for our amazing cheese sauce. Don't let it burn; I almost did once, and it makes the sauce taste off. Keep whisking, you got this!
03 -
Slowly, and I mean slowly, whisk in the whole milk, a little at a time, until smooth. Keep whisking to avoid lumps. Bring the mixture to a gentle simmer, then reduce the heat to low. Stir in the Dijon mustard, nutmeg, salt, and pepper. Now, gradually add your shredded cheddar, Gruyère, and about half of the Parmesan cheese, stirring until everything is melted and smooth. The kitchen will start smelling absolutely incredible, I swear!
04 -
Pour that glorious, creamy cheese sauce over your drained, slightly undercooked macaroni. Gently stir everything together until every single noodle is coated in cheesy goodness. I always end up with a few rogue noodles escaping the bowl during this step; it's just part of the real kitchen experience! Make sure it’s all evenly mixed before the next step for a perfect Creamy Baked Mac and Cheese.
05 -
Lightly grease a 9x13-inch baking dish. Pour the macaroni and cheese mixture into the prepared dish, spreading it out evenly. Sprinkle the remaining Parmesan cheese and those lovely panko breadcrumbs over the top. If you're feeling extra, a tiny drizzle of melted butter over the breadcrumbs helps them get even crisper. This is where it really starts to look like a proper, homestyle Creamy Baked Mac and Cheese casserole.
06 -
Pop the dish into your preheated oven (375°F or 190°C) and bake for 25-30 minutes, or until the sauce is bubbly around the edges and the topping is beautifully golden brown and crispy. The smell filling your house is the absolute best part, honestly. Try not to peek too much, let that cheesy goodness do its thing! Once it's out, let it rest for 5-10 minutes before serving. It helps the sauce set a little.