Doritos Cool Ranch Tuna Noodle Casserole is one of the best casseroles ever, well in my opinion at least!

I don't know what it is but I love this dish.  I love it so much I always make a huge casserole so I have lots of leftovers. 

Maybe it's the Doritos, maybe it's the cheese?  I don't know but everything comes together to create a perfect blend of flavors.