No, and it can work against you. Food is one of the signals your body uses to tell the time, along with light, so eating at 3am nudges your internal clock toward "the day has started." That's the opposite of what you want in the middle of the night.
Why Eating at Night Works Against You
Your body clock runs on cues, and meal timing is one of the strongest: circadian clocks "interact with daily light-dark and feeding-fasting cycles" to set the roughly 24-hour rhythms your body runs on [1]. A big or sugary snack also gives your digestion work to do exactly when everything should be winding down.
So the fix happens earlier in the day, not at 3am. Eat a proper, satisfying dinner, finish it a couple of hours before bed, and let the night be the night. If you wake up hungry at around the same time most nights, that's the signal to look at dinner, not to start snacking in the dark.
If you're genuinely, painfully hungry because you skipped dinner entirely, a few bites of something plain won't ruin the night. Keep it small, low in sugar and caffeine-free (yes, chocolate counts). Make sure not to turn it into a habit.
A really important piece is not lying there waiting it out. If you're fully awake, get up, keep the lights low, and do something undemanding until you're drowsy again. The full routine is in what to do at 3am when you can't get back to sleep.
Night waking can also be a caffeine problem hiding in plain sight. Caffeine blocks adenosine, the molecule that builds up through the day and makes you sleepy, so it lightens sleep and adds brief awakenings, and it does that even when the coffee was hours ago [2]. Worth checking whether caffeine is waking you up at night.
If waking in the night has become a pattern, Rest works on the habits and thoughts keeping you awake. It's a program built on the principles of CBT-I. Start with Rest »
Citations
Panda, S. (2016). Circadian physiology of metabolism. Science, 354(6315), 1008–1015. https://doi.org/10.1126/science.aah4967 — "circadian clocks interact with daily light-dark and feeding-fasting cycles to generate approximately 24-hour oscillations."
Drake, C., Roehrs, T., Shambroom, J., & Roth, T. (2013). Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine, 9(11), 1195–1200. https://doi.org/10.5664/jcsm.3170 — caffeine taken 6 hours before bed still disrupted sleep.