Instructions

  1. Preheat the oven to 325ºF.
  2. Bring a large saucepan of salted water to a boil. Add the macaroni and cook until slightly al dente, about 10 minutes.
  3. Drain and set aside to keep warm.
  4. Whisk the eggs in a large bowl until frothy.
  5. Combine the eggs with the Velveeta, butter, and 2 cups of the half-and-half in a large bowl.
  6. Add the warm macaroni, tossing until the cheese has melted and the mixture is smooth.
  7. Add the remaining half-and-half, 3 cups of the sharp yellow cheddar (reserve 1 cup), the remaining grated cheeses, and salt and pepper.
  8. Toss until completely combined.
  9. Pour the mixture into a 9 x 13 casserole or baking dish and bake for 30 minutes.
  10. Sprinkle top with the remaining 1 cup of yellow cheddar cheese and bake an additional 30 minutes until golden brown on top.
  11. Serve hot.