Step 1

Cook elbow pasta according to package instructions and drain. While pasta is cooking, using a large skillet, melt the butter and cheeses

Step 2

Place cheese and butter mixture, cheddar cheese soup, and sour cream into the pot of the slow cooker

Step 3

Add the cooked macaroni pasta, milk, mustard, salt, and paprika to the pot. Stir everything until well combined and cook on low for 2 hours.