Description
Protein foam stabilized by sugar through mechanical denaturation of ovalbumin.
Technical
Egg white proteins (mainly ovalbumin) unfold through mechanical shear, forming a viscoelastic network that traps air bubbles; sucrose inhibits over-coagulation by competing for water molecules.
Culinary Significance
Fundamental technique for light, airy desserts ranging from simple cookies to elaborate pavlovas, with texture variations controlled by sugar ratio and drying method.
Science
Primary Reaction
Protein Denaturation (Mechanical)
Parameters
Temperature
90°C optimal
60°C to 120°C range
Time
1 hour (French)
15 min (Swiss) – 2 hours (Italian)
Equipment
Copper bowl (catalyzes disulfide bonds)Balloon whiskStand mixer with whip attachmentParchment paper