What You Need to Know
Cryogenic freezing involves cooling food to extremely low temperatures, typically around -196°C, using liquid nitrogen or liquid helium, resulting in denaturation of proteins, formation of ice crystals, and disruption of cell membranes. Thawing cryogenically frozen food requires precise temperature control to prevent the growth of bacteria and other microorganisms, involving rehydration of proteins, reorganization of cell membranes, and reformation of ice crystals.
Steps
- 1.
Nitrogen-frozen herbs (Modernist cuisine): Preserves volatile aromatics
- 2.
Cryo-seared tuna (Japanese kaiseki): Creates glass-like crust while keeping interior raw
- 3.
Instant sorbets (French molecular gastronomy): Achieves ultra-smooth texture
The Science
Primary Reaction
Denaturation of proteins and formation of ice crystals