What does caramelisation mean?
Caramelisation is the chemical process that occurs when sugar is heated to high temperatures — roughly 160°C (320°F) and above — causing it to brown and develop the rich, nutty, toffee-like flavours associated with caramel. Unlike most cooking reactions, it requires no water or protein: it is purely the thermal breakdown and rearrangement of sugar molecules into hundreds of new aromatic compounds. Cooks exploit it constantly, whether caramelising the tops of crème brûlée, slowly browning onions for soup, or glazing meats, while food scientists value it as one of the fundamental sources of cooked-food flavour. The word belongs mainly to culinary and scientific registers rather than casual conversation, and it is often discussed alongside the Maillard reaction, its lower-temperature cousin involving amino acids. Note the regional spelling split: British English writes 'caramelisation', American English 'caramelization'. Understanding the term signals both kitchen literacy and an appreciation of why browned food tastes so much deeper than raw.
nounThe process by which sugar is heated until it browns, producing the characteristic colour and nutty-toffee flavour of caramel. More broadly, any browning of sugars through heat in cooking or food processing.
- The browning of sugar through heating, producing characteristic colour and toasty flavours.
- By extension, the deliberate cooking process used to develop sweet-brown flavours in foods such as onions or meat glazes.
"The deep flavour of French onion soup depends on the slow caramelisation of the onions over low heat."
"A sprinkle of sugar under the grill achieves a glassy caramelisation on top of the crème brûlée."
"Food scientists distinguish caramelisation from the Maillard reaction, since only the former requires no proteins."
Rarely used in the plural; occasionally appears in technical writing referring to distinct browning events or stages.
"The chef noted two separate caramelisations during the glazing process."
Caramelisation doesn't begin until sugar reaches roughly 160°C — which is why patience, not just sweetness, makes great caramel.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of caramelisation
Caramelisation derives from 'caramel', a word borrowed from French in the early 18th century, itself likely from Spanish 'caramelo' meaning burnt sugar. The suffix '-isation' reflects the noun-of-process pattern typical of Latinate English formations, giving a word that names the act of turning something into caramel. Its relatives include other sugar-related terms such as candied and confection, all belonging to the vocabulary of sweet-making that entered European languages largely via French and Spanish.
Related word forms
How caramelisation is actually used
Chiefly a technical or culinary term rather than everyday vocabulary; common in food science, cookery writing, and restaurant menus describing browned or glazed dishes. British English typically uses the -ise spelling 'caramelisation', while American English favours -ize ('caramelization'); both are pronounced similarly with stress on the third syllable.
Easily confused with caramelisation
Caramelisation is browning caused solely by heated sugars, whereas the Maillard reaction involves sugars reacting with amino acids (proteins) and occurs at lower temperatures.