Step 1

Preheat the oven to 325°F.

Step 2

Boil pasta according to package directions.

Step 3

Meanwhile, in a large saucepan, melt ½ cup butter over medium heat. Whisk in flour and cook for 2–3 minutes. Add garlic salt and pepper. Slowly pour in milk, whisking until smooth. Heat to a low boil and cook, stirring occasionally, until thickened, 4–5 minutes. Remove from the heat.

Step 4

Drain pasta and transfer to a lightly greased 9-x-13-inch baking dish. Sprinkle shredded cheese over pasta. Pour thickened cream sauce over pasta and cheese. Let sit until the cheese has melted, then stir together.

Step 5

Melt remaining 2 tablespoons butter in a small skillet over medium heat. Add breadcrumbs, and cook, stirring constantly, until golden brown, 3–5 minutes. Sprinkle over the mac and cheese.

Step 6

Bake for 14–15 minutes. Serve warm.