Caramel notes develop through several routes. Oak aging is the primary source in spirits — extended barrel time produces caramelised compounds that contribute the sweet, slightly burnt-sugar character. Malt roasting in beer (especially in Bourbon, dark beers, and craft IPAs) produces caramel notes through Maillard reactions. Some producers also add E150 caramel colouring, which contributes both colour and slight caramel flavour to certain whiskies and rums. In aged Scotch, Bourbon, and rum, caramel is one of the most universally recognised positive notes — sweet, comforting, and integrating well with vanilla and oak. With 1,348 mentions across 19 categories, caramel is among the most universal positive descriptors on LivCheers.

These three descriptors are related but distinct. Sweet refers to general sugary impression. Vanilla refers to specific creamy-sweet vanilla bean character. Caramel refers to slightly cooked, browned-sugar character — drier than vanilla and richer than simple sweetness. In aged spirits, all three often appear together — a Bourbon might be described as 'sweet vanilla and caramel,' which means the overall impression is sweet, with vanilla notes (cream, custard) and caramel notes (browned sugar, toffee) both present.