OMG guys.  I made this last night (thank you again, Pinterest) and holy balls.  SO good and really easy.  An amazing dish to warm you up!  And stuff your face with.  Works both ways.

RECIPE

1/2 cup chopped onion
3 tablespoons butter or 3 tablespoons margarine, melted
2 (10 3/4 ounce) cans cream of chicken soup
2 cups shredded cheddar cheese, divided
1 cup milk
3 1/2 cups chopped cooked chicken
2 1/2 cups cooked macaroni
salt
pepper
1/4 cup Ritz cracker crumbs

KT TIP - I used saltines instead, because I was too lazy to run out and buy Ritz lol

In a large skillet over med-high heat, saute onions in butter until onions are tender.

Add in soup and 1 ½ cups cheese; gradually stir in milk.

Cook over medium heat until cheese melts; stir in chicken and macaroni; taste and adjust seasoning with salt and pepper.

Transfer mixture to a greased 2 ½ quart casserole; sprinkle with cracker crumbs.

Bake in a preheated 350° oven for 30 minutes or until heated through.

Top with remaining ½ cup cheese and bake 5 minutes.

Thanks to Food.com for the recipe that was posted on Pinterest