Synthetics
Cocoa butenal smells like a sweet, chocolatey note, often used as a food additive.
Mosciano, Gerard P&F 21, No. 5, 49, (1996): Musty, floral, honey, powdery and cocoa
Luebke, William tgsc, (2009): Sweet narcissus cortex beany honey cocoa nutty radish
R C Treatt & Co Ltd: Roast/fried meat; chocolate
Prodasynth: Cocoa, filbert, peanut, chips