01 -
Cook the elbow macaroni according to the package directions. Preheat the oven to 350°F (175°C).
02 -
In a large bowl, whisk together the eggs, evaporated milk, melted butter, prepared mustard, seasoned salt, and black pepper until well combined. Stir in the melted Velveeta and 1 1/2 cups each of the mild cheddar cheese and sharp cheddar cheese.
03 -
Drain the cooked macaroni and add it to the cheese mixture. Stir until evenly coated.
04 -
Transfer the macaroni and cheese mixture to a greased 3-quart baking dish. Top with the remaining mild cheddar cheese and sharp cheddar cheese.
05 -
Bake, uncovered, in the preheated oven until the cheese is melted and the edges are bubbly, about 25-30 minutes.