Cook pasta according to the directions on the package.
In a saucepan, melt butter over medium heat and stir in 1 1/2 tablespoons flour flour. Add 1 1/2 cups milk and reduce heat to low. Stir in cheese slowly until melted and pour over cooked pasta.
Transfer macaroni and cheese to mini springform pans and chill in a refrigerator for 2 hours or freeze for 1 hour or until macaroni and cheese discs can be removed from the springform pans without falling apart.
Heat oil in deep fryer or heavy skillet to 375°F.
Set up a dredging station with three bowls — flour in the first one, 3 beaten eggs and 1/2 cup milk in the second one and crushed Flamin' Hot Cheetos in the third one.
Coat each macaroni and cheese disc in flour, submerge in egg wash and cover in crushed Flamin' Hot Cheetos. Repeat this step a second time if necessary.
Fry macaroni and cheese discs for 5 minutes or until cooked through and then cool on paper towels.
Separate ground beef into two equal sized portions, season with salt and pepper and grill until they reach your desired level of doneness.
Assemble your Big Mac & Cheese by taking one macaroni and cheese bun and topping it with Big Mac Sauce, shredded lettuce, diced onion, a slice of American cheese and one of your burger patties and then repeat the same process finishing off the burger with the third and final macaroni and cheese bun.