Got butterbeer?

Harry Potter fans are all abuzz about butterbeer, and they’ve got the foamy mustaches to prove it.

The cold and creamy, frothy drink is the most popular food item at the new Wizarding World of Harry Potter at Universal Orlando, according to Universal spokesman Tom Schroder, with visitors lining up to try it.

“Then they would walk around and have this mustache on,” said Sabrina Sampson, 11, of Richmond, Va., who described the drink as tasting “like cream soda. It was somewhat thick, and it was really sweet, and then it got salty as you swallowed it, like butterscotch.”

Schroder said that about half the visitors to The Wizarding World sample butterbeer.

“There may be no bigger product launch smash this year than butterbeer,” WalletPop.com said.

“It’s interesting that one small thing they can sell for a few dollars is getting as much attention as the rides,” said Gabe Travers, who reviewed the park for WESH.com, the NBC affiliate in the Orlando area.