Achieve butter-like aroma in a vegan recipe
Many of the modern "vegan butter-like spreads for cooking" have a passable butter flavor, not like the margarines of yore. You do want to get one that mentions it can be used in cooking/baking, rather than the "light" versions that are nearly half water. That's a fairly simple substitution. I'm knee-jerking away from suggesting a specific brand, both to be not spamming and because there are several options.