Description
Tahini crystal control prevents undesirable graininess by managing triglyceride crystallization kinetics through temperature modulation and mechanical shear.
Technical
The phenomenon involves polymorphic transitions of sesame seed triglycerides (primarily SSO and SOS configurations) where β' crystals nucleate under suboptimal conditions, creating gritty mouthfeel. Controlled storage above 15°C slows crystallization while periodic agitation disrupts large crystal lattice formation.
Culinary Significance
Proper technique maintains tahini's signature creamy texture essential for emulsified sauces like hummus and halva production, where crystal size directly impacts mouthfeel and stability.
Science
Primary Reaction
Triglyceride Polymorphic Transition
Parameters
Temperature
18°C optimal
10°C to 25°C range
Temperature range for optimal crystallization control
Time
1 hour
30 minutes – 2 hours
Equipment