Indulge in the ultimate comfort food with this Million Dollar Mac and Cheese recipe. Featuring a rich blend of extra sharp cheddar, Monterey Jack, and Gruyère cheeses, this decadent dish is perfect for any special occasion or family gathering.
Preheat the oven to 350 F. degrees. Grease the bottom and sides of a 4 quart Casserole dish with softened butter and set aside.
Boil the pasta following the directions on the box.
Shred all of the cheeses.
Measure out the other ingredients and have nearby.
Make the Sauce
In a large saucepan, over medium heat, melt the ¼ cup of butter. Add the flour and whisk until the flour has blended with the butter forming a thick lump free paste. Continue to whisk as the roux cooks for 2 to 3 minutes and becomes a light golden color. Once golden, while whisking slowly pour the milk and half and half into the sauce pan. Whisk constantly to prevent lumps in the cheese sauce.
Add the Dijon mustard, seasoned salt, parsley and black pepper to the mixture. Cook the sauce for 5 or 6 minutes, while whisking constantly as it thickens.
Turn off the burner. While whisking slowly add the shredded cheddar and Monterey jack cheese a cup at a time until melted and the sauce is smooth.
Once the cheeses have melted completely pour the cheese sauce over the drained pasta in the pot. Stir to coated evenly.
Pour half of the pasta into the greased baking dish. Sprinkle half the Gruyere cheese over the pasta.
Dollop the sour cream over the shredded cheese and using a spoon spread in an even layer.
Pour the remaining pasta and cheese sauce into the Casserole dish and spread over the top. Sprinkle the remaining Gruyere cheese over the top.
Mix the Panko topping ingredients in a small bowl and Sprinkle over the top of the last layer of cheese.
Bake in the preheated oven for 30 minutes or until the topping is golden brown and the cheese sauce is bubbling.
Remove from the oven and allow to rest on the counter for 10 to 15 minutes before serving.