The KFC Double Down is back, but technically it's not on the menu, instead you have to ask for it at the counter.

KFC's monster burger creation the Double Down is back but the chicken company aren't clucking about its return.

Those eager to try the bunless burgers were told to ask for it in secret, with no mention of it on the menu.

In an email to VIP customers the company said punters could get "secret access" to the Double Down at any of their New Zealand outlets on Sunday or Monday.

They said it would then be released nationally on Tuesday.

READ MORE

* Conquered the Double Down? Try this...

* Double Down burger 'no worse than others'

Made of chicken breasts instead of bread, the burgers would be available in two different flavours: aioli or kumara hash.

The Double Down was first released in New Zealand in 2011 amid much fanfare and criticism from health advocates.

For those counting their calories, the Original Recipe Double Down weighs in at 540 cal, 32g of fat and 1380mg of sodium.

As a comparison, that stacks up to:

Burger King Whopper: 663cals, 37g fat, 1017mg sodium

McDonald's Big Mac: 491cals, 26g fat, 1080mg sodium

Chicken & Bacon Ranch Subway: 456cals, 21.3g fat, 1200mg sodium

Pizza Hut Meatlovers (per slice): 202cals, 7g fat, 537mg sodium