Crock Pot Macaroni and Cheese

I have a lot of great macaroni and cheese recipes.  I like creamy ones and baked ones.  This is my favorite creamy crock pot version. 

2 cups uncooked elbow macaroni
4 TBSP butter, cut into pieces
2 1/2 cups grated sharp cheddar cheese
3 eggs, beaten
1/2 cup sour cream
1 (10 3/4 -ounce) can condensed cheddar cheese soup
1/2 tsp salt
1 cup whole milk
1/2 tsp dry mustard
1/2 tsp black pepper

Boil the Macaroni in a 2 quart saucepan in plenty of water until tender, 7 minutes. Drain.

In a medium sauce pan mix butter and cheese.  Stir until cheese melts.

In a slow cooker combine, cheese and butter mixture, eggs, sour cream, soup, salt, milk, mustard and pepper.  Stir well.

Add the macaroni and stir again.  Set the slow cooker on low and cook for 3 hours.  Stirring occasionally.