Crockpot Macaroni and Cheese

I got this recipe from the Six Sisters' Stuff. They are amazing!! This is so much better than the blue box stuff! Don't get me wrong, I still whip that up now and then, but when planned and I have all the ingredients on hand (which I normally do) this is my go to for an easy and yummy dinner! Especially on those days that I know its going to be crazy!

Ingredients:

2 cups uncooked elbow macaroni

4 tablespoons butter
2 1/2 cups grated sharp cheddar cheese
1/2 cup sour cream
1 (10.75 oz) can condensed cheddar cheese soup
1/2 teaspoon salt
1 cup milk (I used 1%)
1/2 teaspoon dry mustard
1/2 teaspoon black pepper

Directions:
Boil the macaroni in water for six minutes and drain. In a medium saucepan, mix butter and cheese. Heat over medium high heat and stir until the cheese melts. Spray your slow cooker with non-stick cooking spray. Combine cheese mixture, sour cream, soup, salt, milk, mustard and pepper in your slow cooker. Add the drained macaroni and stir again. Cook on low for 2 to 2 1/2 hours, stirring occasionally (I cooked mine for about 2 hours and stirred it twice and it was perfect