Oregon mom Jessica Hard came up with a tasty parenting hack recently, showing that mayonnaise is not just for sandwiches. Nope. It can also be used to remove crayon from the wall after the little redecorators have been at work.

Hard told Storyful that when her son scribbled on the wall, she started searching for ways to remove the stains. When she heard that mayo would remove the stains, she thought, “No way that would ever work. But you know? Let’s just give it a shot for laughs.”

When it actually worked she “could not believe it,” she said.

LifeHacker has previously tested mayo’s cleaning properties; they said the oils in it are good for breaking down crayon wax. Credit: Jessica Hard via Storyful