AUSTIN (KXAN) — Mayor Steve Adler revealed Friday the contents of an official letter to extraterrestrials and future citizens of the solar system that will be placed on the moon approximately 40 days from today, mid-April.

The letter was aboard the SpaceX Falcon rocket that launched out of Cape Canaveral, Florida, on Thursday night.

Mayor Adler’s letter includes a copy of the original and never-before-published Kerbey Queso recipe from Kerbey Lane Cafe.

On the choice, Adler said: 

“We choose to send queso to the Moon — and maybe someday chips as well, not because these things are easy, but because they are hard. The challenge to eat queso in zero gravity is one that we are willing to accept, one we are unwilling to postpone,, and one we intend to win, among other key challenges, like next time remembering the chips.”

The rocket is carrying a moon lander from commercial space exploration outfit SpaceIL, which in turn is carrying the Lunar Library from the Arch Mission Foundation. The physical archive is comprised of millions of documents laser etched in microscopic analog form on a radiation-proof nickel Nanofiche disk. It will be placed on the moon permanently.

“We are so happy to take the recipe for our best selling item of all time to the moon,” said Kerbey Lane Cafe CEO Mason Ayer. “I suppose getting the ingredients together out there in space is a whole ‘nother story. But as central artifacts of civilization go, I can’t think of a more important, sustaining foodstuff.”

Read Adler’s full letter to extraterrestrials here.