Secret menu items/requests that we like are "well done" fries and "whole grilled onion." Well done fries means crispier fries. Whole grilled onion is a whole slice, grilled versus the regular grilled onions (cut up and grilled).
We've had their "cheese fries" off the secret menu, but thought it was a waste of money. I think it was over double the price of their regular fries with just some melted cheese on top. The more than double the price was not worth it. The amount of fries in the cheese fries was the same as the regular fry order.