These cards were distributed by Ralston Foods, Inc. in their "Cookie Crisp Chocolate Chip ®" (Artificial Flavor) breakfast cereal packets in 1994. There are only six cards in the set, but they are numbered non-sequentially (presumably so that the poor consumer didn't know when to stop buying).
Ralston Foods sold the "Cookie Crisp" trademark to General Mills in 1997 (who subsequently changed the recipe). Note that Ralston Foods is incorrectly spelled as "Rolston Foods" in the laterally-printed legal fine print on these cards.