Cookie Time is a Jimmy Neutron: Boy Genius short.
Jimmy tries to get cookies, but to have brussel sprouts for dinner, his mother tells him just one cookie. Jimmy uses his latest invention, the Quantum Replay to repeat in three times. Goddard then tries to eat the remote, causing him and Jimmy to end up time traveling in prehistory. A T-Rex then chases after them.
This is this a video of the short.