What You Need to Know
Air cells are trapped within a continuous phase (typically water or fat) via shear forces, with amphiphilic molecules (proteins, phospholipids) lowering interfacial tension at bubble surfaces. Overrun (volume increase) ranges 100-1000% depending on stabilizers.
Creates lighter textures without dilution, enables flavor delivery through increased surface area, and modifies mouthfeel perception.
Key Parameters
Temperature
8°C
2°C - 25°C
Time
3-5 minutes
30 seconds - 15 minutes
Equipment
WhiskStand mixerSiphon charger (for espumas)Rotor-stator homogenizer
Steps
- 1.
Saffron air (El Bulli): Delivers aromatic compounds via increased surface area
- 2.
Foamed hollandaise (French nouvelle cuisine): Reduces density while maintaining emulsion stability
The Science
Primary Reaction
None (physical entrapment)