Food & Drink

The Chemistry of Cooking

Learn the handful of reactions behind browning, setting, thickening, and rising so you can cook by cause and effect.

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What you will learn about The Chemistry of Cooking

The 7-day sprint
  1. Water Sets the Ceiling. As long as liquid water is on the surface of food, that surface cannot get much past 100 °C (212 °F), which is below the temperature where browning flavors form.
  2. The Maillard Reaction. Browning that smells savory comes from amino groups in proteins reacting with reducing sugars, creating hundreds of new aroma compounds and brown pigments.
  3. Caramelization Is a Different Reaction. Caramelization is sugar breaking down under heat all by itself, with no protein involved, and it starts at a different temperature than the Maillard reaction.
  4. Proteins Unfold and Set. Heat, acid, and whipping unfold coiled protein molecules, and the unfolded strands bond to each other into a network, which is what turns runny eggs firm and raw meat opaque.
  5. Starch Swells, Then Firms Back Up. Starch granules absorb water and burst open when heated in liquid, which thickens sauces, and on cooling the freed starch chains recrystallize, which stales bread.
  6. Emulsions Hold Oil and Water Together. An emulsion is droplets of one liquid suspended in another that will not normally mix, kept apart by an emulsifier that sits at the boundary between them.
  7. pH, Leavening, and Putting It Together. Acidity is the quietest control knob in the kitchen: it decides whether carbon dioxide is released, how fast food browns, and how firmly proteins set.
The 80/20: the 7 concepts that matter most
  • Water controls surface temperature
  • The Maillard reaction
  • Protein denaturation and coagulation
  • Starch gelatinization and retrogradation
  • pH as a control knob
  • Emulsions and emulsifiers
  • Caramelization is not Maillard
The core idea, explained like you are 5

Cooking is controlled chemical change: heat and time rearrange the molecules in food, and the amount of water present decides how hot the food can get and therefore which changes are allowed to happen.

Then the quiz and the ladder

10 questions that correct you when you are wrong, and beginner, intermediate, advanced levels, each with a practical exercise.

Created Sep 13, 2026. No mistakes have been reported by learners.

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