Step 1

Cook the butter and garlic in a large skillet over medium heat until butter is melted and garlic is fragrant.

Step 2

Stir in the chicken broth and heavy cream. Simmer, whisking frequently, until sauce has started to thicken.

Step 3

Turn heat to low and whisk in 2 cups of parmesan cheese and the seasonings until the cheese has completely melted and the sauce is smooth.

Step 4

Combine the sauce with the pasta, the cooked chicken, and 2 cups of mozzarella.

Step 5

Press pasta mixture into a 9x13 inch casserole dish, and sprinkle the remaining cheese over the top.

Step 6

Bake uncovered at 350 degrees F for 20 minutes.