Discovered it couple of weeks ago while trycking to check out the secret menu and loved it since. Its a huge 3816kJ and it will fill you up!!! I believe back in 2019 it used cost $8.95 but now it comes with 2 Zinger fillet so I would say still a good value.
If you are unsure how to access the Secret Menu on the app - go the menu page on the app, slide down the screen and hold for a few seconds until you see the Colonel Sanders guy and the Secret Menu should appear afterwards.
Some of the other items currently available under the secret menu are -
Spicy snack - $7.45
Spicy snack combo - $11.45
Nugget slider - $3.95
Nugget slider combo - $7.95
Zinger slider stacker combo - $14.95
Maybe on paper.. I’m still hungry after this
And if you have to ask how fat I am, the answer is: