It’s possible. Cacao is a mild stimulant from the combination of theobromine and caffeine. It's not as jittery as coffee or caffeinated soda. The energy is more smooth and sustained, probably because the amount of theobromine is much higher than caffeine. But different people react differently to cacao. Some people could have a cup at night and not having any trouble falling asleep. Other people might drink a cup at noon and stay awake til 4:00am!  In general, we’d recommend not having cacao within 6 hours of when you’re hoping to go to sleep. And our favorite time range to enjoy cacao is between 10:00am and 4:00pm.Check out our report on caffeine and theobromine in ceremonial cacao!