Be sure that your macaroni is cooked al dente before you put it in the slow cooker so it doesn’t become mushy. If you prefer or if you are short on time, you can bake this in the oven (and I have many many times!) Preheat the oven to 350 degrees F. Bake 30 minutes covered and 30 minutes uncovered.
If you do not have gruyere cheese, you can use 4 cups cheddar instead.
*Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.