He’s Not Heavy, He’s My Hatter Adventures in Wonderland : Season 1 Episode 36

After indulging in too many of his grandmother's cookies, the Mad Hatter is forced to go on a diet and exercise program. He tells the Hare to hide the offending cookies. When his resolve weakens, and he tries to find them again, Hatter unknowingly burns up the calories as he searches all over Wonderland for the hidden cookies.