World's Best Macaroni and Cheese!
Swapping fontina for low-moisture mozzarella shifts this bake from a sharp, complex profile toward a stretchy, mild pull. Traditional American comfort food relies entirely on how dairy interacts with heat. Four distinct cheeses—cheddar, fontina, gruyere, and parmesan—bring varying levels of moisture and fat to the dish. Grating these blocks from scratch rather than buying pre-shredded bags prevents anti-caking agents like cellulose from altering the final sauce consistency.
Proteins in dairy tighten rapidly when exposed to excessive heat, squeezing out fat and creating a gritty, separated sauce. Keeping the saucepan at a true medium heat protects the emulsion. Egg yolks act as an essential binder, introducing lecithin to stabilize the heavy cream and half-and-half mixture. Boiling the sauce will break the cheese instantly, turning a smooth matrix into a rubbery curd.