Maillard Reaction
noun /maɪˈjɑːr rɪˌæk.ʃən/ — The browning reaction that gives cooked food its complex flavor.
Definition
A chemical reaction between amino acids and reducing sugars when food is heated above 140°C, producing hundreds of flavor compounds and the characteristic brown crust. Responsible for the flavor of seared meat, bread crust, roasted coffee, and toasted bread.
Beyond the definition
The Maillard reaction is why food smells the way it does when it's becoming itself — the exact moment of transformation from raw into something new.
Origin & history
Named after Louis-Camille Maillard, the French chemist who described it in 1912.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
A proper sear requires a hot, dry pan — moisture prevents the Maillard reaction and you get steaming instead of browning.
The complexity of a good espresso comes entirely from Maillard reactions in the roasting — hundreds of new compounds in every cup.
She understood instinctively what food science confirmed: the crust was the point, and the crust was chemistry.
How to use it
This entry uses a noun. Follow the examples for articles and singular or plural forms; not every noun takes “a” or “an.”
Choose “Maillard Reaction” when the meaning fits your context: A chemical reaction between amino acids and reducing sugars when food is heated above 140°C, producing hundreds of flavor compounds and the characteristic brown crust. Responsible for the flavor of seared meat, bread crust, roasted coffee, and toasted bread.
Synonyms
browning reaction, chemical browning
Related words
Maillard Reaction vs caramelization
Maillard reaction requires both proteins and sugars to create savory, browned flavors. Caramelization focuses strictly on the thermal decomposition of sugars alone.
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Baker Kneading Airy Bread Dough
A baker kneads elastic dough on a warm counter, with a sliced, airy loaf nearby showcasing a browned, crusty surface.
The Maillard reaction is the chemical process creating a browned, flavorful crust on heated food. The contrast between the dough and the finished loaf's surface illustrates this foundational culinary reaction.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Maillard Reaction" mean?
Maillard Reaction is noun meaning: The browning reaction that gives cooked food its complex flavor.. A chemical reaction between amino acids and reducing sugars when food is heated above 140°C, producing hundreds of flavor compounds and the characteristic brown crust. Responsible for the flavor of seared meat, bread crust, roasted coffee, and toasted bread.
Where does the word "Maillard Reaction" come from?
Named after Louis-Camille Maillard, the French chemist who described it in 1912.