01 -
Preheat oven to 175°C (350°F). Grease a 23x33 cm baking dish with cooking spray and set aside.
02 -
Bring a large pot of salted water to a rolling boil over high heat. Add elbow pasta and cook until al dente according to package instructions. Drain using a colander without rinsing.
03 -
In a medium saucepan over medium heat, melt butter. Whisk in flour and cook for 2-3 minutes, stirring constantly to form a roux.
04 -
Gradually whisk in milk, salt, and black pepper. Continue cooking while stirring frequently for about 5 minutes until sauce thickens.
05 -
Add shredded yellow cheddar, white cheddar, American cheese slices, parmesan, and romano cheeses to the sauce. Stir continuously until fully melted and smooth.
06 -
Gently fold the cooked elbow pasta into the cheese sauce until evenly coated. Transfer mixture to the prepared baking dish and evenly top with remaining shredded cheddar cheeses.
07 -
Bake uncovered for 15-20 minutes or until the surface is bubbly and golden. Optionally, broil for a few minutes to achieve a crispy top.