Preheat oven to 350 degrees. Cook and drain macaroni. Heat milk, eggs, butter, and cheese in a small saucepan until cheese is melted. Stir together macaroni, cheese mixture and salt and pepper. Pour into a buttered casserole and bake for 20-30 minutes until just beginning to brown.
Optional: Grandma often added some finely crushed soda crackers on top of casserole during the last 10 minutes of baking to give the dish a little crunch.