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Food Science & Technology

Maillard Reaction

Chemistry that gives cooked foods their golden color and aromatic flavor.

Definition

Non-enzymatic chemical reaction between amino acids and reducing sugars under heat, producing characteristic golden aromas, flavors, and browning.

How it works

Described by Louis-Camille Maillard in 1912, this reaction produces hundreds of aromatic molecules responsible for the flavors and aromas of toasted bread, roasted meat, torrefied coffee, and beer. It starts significantly at 140-150°C. It also generates acrylamides (potentially toxic) during prolonged high-temperature cooking.

Role

Developing the aromas and colors of cooked foods, but potentially producing undesirable compounds at high temperatures.

Examples

  • Bread crust
  • Grilled meat
  • Torrefied coffee
  • Golden biscuits
  • Grated cheese crust

Recommendations

Moderate prolonged high-temperature cooking (frying, grilling) to limit the formation of acrylamides.

Key takeaway

The golden color of bread is pure chemistry — but avoid charred cooking that generates toxic compounds.

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