Marshmallow in perfumery is not a direct extract from the confection or the Althaea officinalis plant, but a synthetic accord crafted to mimic the sweet, fluffy, and powdery aroma of the treat. The scent profile is built around vanillin or ethyl vanillin (CAS 121-33-5/121-32-4) for a core white sugar sweetness, ethyl maltol (CAS 4940-11-8) for cotton candy airiness, heliotropin (piperonal, CAS 120-57-0) for a powdered sugar nuance, and musks (such as galaxolide, CAS 1222-05-5) to impart a soft, pillowy texture. Trace amounts of benzoin or tonka bean add creamy depth, while the overall effect is a blend of creamy, airy, and subtly vanilla notes. This construction answers the question, "what does marshmallow smell like" in the context of modern perfumery: it is a photorealistic, gourmand fantasy, not a botanical reality.
In perfumery, marshmallow is classified as a heart or base note, with typical usage concentrations ranging from 2–8% of the total formula, depending on the desired intensity and the presence of other gourmand notes. Its molecular components are chosen for their low volatility and high tenacity, allowing the marshmallow accord to persist and evolve on skin. Marshmallow interacts with skin chemistry by amplifying sweet, powdery facets on warmer, more acidic skin, and can become creamier or more lactonic on alkaline skin due to the interplay with musks and vanillin. In some compositions, it is used as a top note for immediate impact, but its true strength lies in its ability to provide a long-lasting, enveloping sweetness that supports and softens other notes.
Notable fragrances that exemplify marshmallow in perfumery include By Kilian Love, Don’t Be Shy (2007, perfumer Calice Becker), where the marshmallow accord is paired with orange blossom and neroli for a lush, creamy effect, and Parfums de Marly Oriana (2021, perfumers Nathalie Lorson and Marie Salamagne), which uses marshmallow as a dominant heart note, blended with raspberry and Chantilly cream. Commodity Milk (2021, perfumer Christelle Laprade) showcases a modern, musky marshmallow accord, while Sabrina Carpenter Sweet Tooth (2022) highlights marshmallow alongside candied ginger and chocolate. These examples illustrate the versatility and enduring appeal of the marshmallow scent profile in contemporary fragrance design.