01 -
Heat the oven to 375°F (190°C). Boil the macaroni in well-salted water until al dente, usually 1 minute less than the package says. Drain well.
02 -
Return the hot macaroni to the pot. Add the salted butter and stir until melted and evenly coating the pasta.
03 -
In a large bowl, whisk the evaporated milk, whole milk, eggs, garlic salt, and black pepper until smooth.
04 -
In a separate bowl, toss the shredded cheddar and mozzarella together so the two cheeses are evenly mixed.
05 -
Grease a 9x13 inch baking dish. Add one-third of the macaroni, then one-third of the cheese mixture. Repeat the layers until all the macaroni and cheese are used.
06 -
Pour the milk mixture slowly and evenly over the layered macaroni. Tilt the dish gently if needed so the liquid reaches the corners. Sprinkle paprika over the top.
07 -
Bake uncovered for 25-30 minutes, until the edges bubble and the top is golden. Rest for 8-10 minutes before serving.