Quick answer
Peanut butter may fit only as a tiny occasional amount for hamsters. It should not replace the normal diet.
Use a tiny occasional amount only. This should not become a daily food.
Seed / nut safety check
Can Hamsters Eat Peanut Butter?
Peanut butter may fit only as a tiny occasional amount for hamsters. It should not replace the normal diet.
Preparation
Use plain xylitol-free peanut butter only.
Watch-outs
High fat; label check is mandatory.
Why this answer changes by species
Hamsters usually rely on balanced hamster mix. That makes peanut butter different from a generic human-food answer, especially around wet leftovers, sugary foods, salty snacks, and choking hazards.
Related foods for hamsters
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Sources used
FAQ
Can hamsters eat peanut butter?
Peanut butter may fit only as a tiny occasional amount for hamsters. It should not replace the normal diet.
How should peanut butter be prepared for hamsters?
Use plain xylitol-free peanut butter only.
What should I watch for with peanut butter and hamsters?
High fat; label check is mandatory.