Caramel, made from nothing but fire.

Caramelization is thermal pyrolysis of sugar - bonds break, water leaves, fragments recombine. No proteins. No acids. Just sugar, heat, and time producing hundreds of new flavor molecules.

The Four Stages

~160°C

Melt & Foam

Sucrose liquefies. Water boils off. Crystal structure surrenders to heat - still clear, but volatile.

~170°C

Light Caramel

First color appears. Buttery, nutty notes emerge as molecules begin to fragment and rearrange.

~180°C

Deep Caramel

Rich amber. Bittersweet complexity at its peak. Toasted, almost smoky aroma fills the air.

200°C+

Burnt - flavor collapses

Past 200°C, sugar carbonizes. Acrid, harshly bitter. No going back from here.

The Chemistry

One sugar in. Hundreds of compounds out.

Sucrose

Start

→

Caramelans

Color

→

Diacetyl + Furans

Aroma

Heat fragments sucrose into reactive intermediates that dehydrate and recombine into long pigment polymers and small volatile flavor molecules. The buttery note? Diacetyl. The nutty note? Furans.

Don't confuse it with

The Maillard Reaction.

NeedsSugar + protein

Starts at~140°C

ExampleSeared steak, toast

CaramelizationSugar alone, ~160°C+

Temperatures vary by sugar type, vessel & method. May 2026