Description
Kappa carrageenan forms thermo-reversible gels with dairy calcium ions through helical aggregation.
Technical
Sulfated galactan polymers in kappa-carrageenan undergo coil-to-helix transition upon cooling, with calcium ions bridging sulfate groups (-OSO3-) to form rigid, brittle gels. Syneresis occurs due to tight junction zones.
Culinary Significance
Enables dairy-free cheese textures without casein, particularly effective in high-fat systems mimicking cheddar or mozzarella.
Science
Primary Reaction
Ionic crosslinking of carrageenan helices
Parameters
Temperature
60°C optimal
35°C to 85°C range
Time
30 minutes
5 minutes – 24 hours
Equipment
Immersion blender (for dispersion)Sous vide circulator (temperature control)Silicon molds (demolding)