BOSTON (CBS) –- McDonald’s is experimenting with swapping out the Big Mac’s two all-beef patties for something else – chicken.

Chicken Big Macs are now on the menu in Australia. They’ve been part of McDonald’s so-called secret menu for a while – meaning customers asked for it and McDonald’s made it.

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The Chicken Big Mac (Image credit: McDonald’s)

Now the Golden Arches is making it official, at least temporarily.

There’s no word yet on whether it could come to the United States, but judging from the reaction on Twitter, the demand is there.

The chicken Big Mac comes with everything you’d get on the burger, including that special sauce.