Portillo's is launching two new secret menu items just for their perks members, at least to start.

The Chicago-based chain best known for their hot dogs and Italian beef sandwiches announced Tuesday it has added chili cheese fries and a triple cheeseburger to its menu, which Portillo's Perks members can order from a hidden menu on restaurants' digital kiosks.

The chili cheese fries feature Portillo's crinkle cut fries, smooth cheddar cheese sauce and chili with beans. The triple cheeseburger features three 1/3 pound charbroiled beef patties topped with cheese, mayonnaise, lettuce, tomato, red onion, pickles and ketchup on a toasted old-fashioned bun.

The company also hinted that these are just the first of more secret menu items to come. To order, members should go to the kiosks inside Portillo's locations; when you see a dog on your screen, pat its head and unlock the secret menu.

You can sign up to join Portillo's Perks on their website.