Freckle Juice (ISBN 0-440-42813-0) is a 1971 children's chapter book by Judy Blume with illustrations by Sonia O. Lisker.

But when Andrew gets to eighty-six, his teacher --just when he is at eighty six-- Miss Kelly (who caught him counting) asks if he's paying attention.

However, he finds the completed product putrid smelling and terrible tasting, but he still reluctantly gulps a glass down, and (after trying the potion) crawls to a mirror to see if it works.

Realizing that Sharon had only swindled him, Andrew dots his face and neck with a blue magic marker near the window of a car (since he had no luck finding a brown one) to try to show her that the "freckle juice" had worked.

After recess, Miss Kelly kindly sends him to the restroom with her "secret formula" for removing freckles, which turns out to be a bar of lemon-scented soap.

The conniving little girl, understanding teacher, and feckless, freckleless boy are amusingly depicted in the impish black-and-white illustrations and in the story which is especially suited for reading aloud to second-and third-graders."