Bring a large pot of water to a boil and add the macaroni noodles. Cook according to package al dente directions.
Preheat the oven to its broil setting.
In a medium saucepan, add the heavy cream and evaporated milk. Bring to a simmer over medium heat.
Add the sliced American cheese, Parmesan cheese, and Romano cheese to the saucepan. Whisk until all of the cheese has melted.
Pour the cooked pasta into a 9x13-inch baking dish.
Pour the cheese sauce over the macaroni.
Sprinkle the shredded Colby Jack cheese on top.
Place the baking dish under the broiler and cook for just long enough that the cheese begins to brown.
Recipe Tips
My original recipe did not contain the evaporated milk. I now suggest adding evaporated milk to make it creamier, and it will reheat better with it. If desired, you may omit evaporated milk.