It is possible to create diamonds from peanut butter using scientific methods.

Caveats

• The only known peanut-butter-to-diamond experiment was a single, unreplicated TV demonstration by Dan Frost — not a peer-reviewed scientific study — and the apparatus was destroyed by hydrogen release before the process could be completed.
• All sources reporting this experiment trace back to a single BBC interview; there is no independent experimental verification, making the evidence base extremely thin for the peanut-butter-specific aspect.
• Established diamond synthesis methods (HPHT and CVD) use pure carbon feedstocks like graphite; peanut butter's hydrogen content actively interferes with the process, making it an impractical and unviable carbon source.