Turns out butterbeer is just as popular with Muggles as with witches and wizards.

Universal Orlando officials said Thursday that the one-millionth mug of the delicious frothy, butterscotchy libation was sold over the holidays inside The Wizarding World of Harry Potter attraction, which has been open only since June.

The nonalcoholic drink, served cold or frozen, was inspired by the Harry Potter stories of J.K. Rowling, whose characters regularly tipped a pint or two. Rowling approved the secret recipe for the butterbeer now served at the park.

The Wizarding World of Harry Potter, situated inside Universal's Islands of Adventure, has a been a sensation, boosting park attendance 36 percent in its first three months.