What You Need to Know
Propeller blending induces turbulent flow and shear forces that break surface tension, dispersing gas (usually air) into the liquid phase as microbubbles stabilized by surface-active agents like proteins or emulsifiers. The resulting foam structure depends on the Bingham plastic behavior of the continuous phase.
Produces velvety foams for sauces, cocktails, and garnishes with superior stability compared to whisking, enabling precise plating and prolonged service life.
Key Parameters
Temperature
15°C
4°C - 60°C
Time
45 seconds
15 seconds - 2 minutes
Equipment
Immersion blender with propeller attachmentNarrow blending vesselChilled metal bowl (for heat-sensitive foams)
Steps
- 1.
Espresso Air (El Bulli, Spain): Creates stable coffee foam without dairy
- 2.
Soy Lecithin Foams (WD-50, USA): Enables vegan foams with heat stability
The Science
Primary Reaction
Mechanical emulsification