Step 1

Boil the macaroni in water for six minutes. Drain.

Step 2

In a medium saucepan, mix butter and cheese. Stir until the cheese melts.

Step 3

In slow cooker, combine cheese mixture and add the eggs (I omitted the eggs), sour cream, soup, salt, milk, mustard and pepper. Add the drained macaroni and stir again.

Step 4

Cook on low for 2 1/2 hours, stirring occasionally.