Description
A twice-cooked paste where flour gelatinizes in boiling water-fat mixture, then emulsifies with eggs to form a steam-leavened dough.
Technical
Starch gelatinization occurs at 60-70°C as water hydrates flour granules, while egg proteins (ovalbumin, ovotransferrin) denature at 62-65°C to form a protein network. Steam expansion during baking (100-180°C) creates hollow interiors via vapor pressure.
Culinary Significance
The unique ability to puff without chemical leaveners makes choux indispensable for airy pastries. Proper hydration and emulsification determine structural integrity - undercooked paste collapses, while overworked eggs yield dense textures.
Science
Primary Reaction
Starch gelatinization followed by protein network formation
Parameters
Temperature
80°C optimal
75°C to 85°C range
Panade stage critical for starch gelatinization
Time
6 minutes
5 minutes – 8 minutes
Panade cooking until film forms
Equipment