First Appearances - Cookie Monster

A sharp-toothed prototype of the Cookie Monster makes his first appearance as the Wheel Stealer in a 1966 unaired pilot ad for General Foods Canada’s Wheels, Crowns and Flutes snacks. According to Muppet Wiki, the “Wheel-Stealer” puppet then went on to star in an IBM training film called The Coffee Break Machine. Later, he appeared (toothless) as Arnold the Munching Monster for a Frito-Lay Munchos commercial. Cookie Monster eventually made his debut on Sesame Street in 1969.



Check out the link for more classic Cookie Monster clips and information.

http://laughingsquid.com/the-earliest-appearances-of-cookie-monsters-sharp-toothed-prototype/