I would like to find a children’s picture book checked out from library in the early 90’s (most likely published then but possibly in 80’s), about a woman who was ugly/plain and wanted to be beautiful so the prince would marry her.  A little old man with a raisin looking face peddled her a potion but told her only to take it sparingly and it would make her pretty.  She did and then got vain and took it all, and became beautiful but ugly on the inside.  She was mean to the raisin face man and I think he turned out to be the prince under a curse and she didn’t end up with him after all.   Was a colorful picture book. 
Not the book titled Sleeping Ugly.