The Birthday Cookie? Are you thinking of Cookie Monster having a nightmare on meeting The Giant, Talking, "Monster Cookie?" I remember that skit. After Cookie Monster eat the whole box of birthday cookies that his grandmother made for his birthday, He felt depressed that there were no cookies left for birthday party. And he took a nap and dream about meeting "The Monster Cookie" who told Cookie Monster the sad tale on how he became that way. The Monster Cookie was also a blue furry monster, too. But eating too many cookies has caused him to become a cookie. And now, He regrets he never had any healthy treats. When Cookie Monster wakes up from his dream sadley, He sobbed "What a dream! Oh, Very sad!" He took his vision's advice and vows to never eat cookies again! So, Instead of cookies, Cookie Monster decided to eat carrots, fish, and whole-wheat bread. And then eats a cookie and said "Well, Maybe sometime a cookie." BTW, This was a pre-Veggie Monster sketch from 1992.