What You Need to Know
Feathering relies on tempered chocolate's β' crystal formation (melting point 28-31°C) creating viscosity contrast with untempered chocolate (containing unstable Form I crystals). The technique exploits Marangoni flow - surface tension differentials between the two chocolates cause spontaneous pattern formation when dragged with a tool.
Used for decorative finishes on desserts like entremets and bonbons. Requires precise chocolate tempering (31-32°C for dark) and rapid execution before crystallization completes. The contrasting chocolate should be 3-5°C warmer than the base layer for optimal flow.
Key Parameters
Temperature
30°C
25°C - 35°C
Time
1 hour
30 minutes - 2 hours
Equipment
Steps
- 1.
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The Science
Primary Reaction
Cocoa butter polymorphic crystallization