What You Need to Know
The citric acid in lemon zest lowers pH, partially denaturing egg proteins (ovalbumin and ovotransferrin) to create more elastic films around air bubbles. Simultaneously, citrus oils (limonene) plasticize the protein matrix.
Zest incorporation allows taller rises and delays collapse by 15-20% compared to plain soufflés.
Key Parameters
Temperature
175°C
160°C - 190°C
Time
20 minutes
18 minutes - 22 minutes
Equipment
Copper bowl (reduces sulfur binding)Balloon whiskRamekins with straight sides
Steps
- 1.
Grand Marnier Soufflé (Parisian bistros): Orange zest replaces lemon for alcohol stability
The Science
Primary Reaction
Acid-induced protein denaturation