Cook pasta to al dente, per instructions on box. Drain.
Layer half of pasta on bottom of dish and dot with butter. Salt and pepper and layer with 1/2 the shredded cheese.
Layer again with remaining pasta. Salt and pepper and sprinkle remaining cheese on top.
Add milk to where it's just below the top layer of cheese.
*Make sure you use whole milk - I've tried it using 2% and it doesn't cook right*
Bake 45 minutes or until the top turns a golden brown. Remove from oven and let it set for about 10 minutes before serving.
This is a good size for 2-3 people. I've made it for more people using a 9x13 dish. If you're going to use a 9x13 dish, use 2 1/2 cups pasta (I like elbow macaroni and small shells) and 16 oz. shredded cheddar cheese.