Okay. Forget about my last post. This one I'm sure is REALLY where it's at. Remember the episode "Tough Cookies"? I think Karla got the idea from seeing an episode of Family Guy I have seen myself. In that episode, Lois offers Peter some cookies made with Mrs. Pewderschmidt's recipe, and Peter, after tasting it, gets the idea to run a cookie shop, though things don't go well.
I've seen that episode, and "Tough Cookies" as well. And there might be similarities between both. Either the first idea, or the similarities are purely coincidental, which is obviously more likely. Comment below what you think.