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Step-by-Step Tutorial
PRACTICAL WALKTHROUGH · PARAMETERS · COMMON MISTAKES
Castagna Emulsion is a thermally‑controlled process that gelatinizes chestnut starch and incorporates clarified butter to form a stable emulsion.
Origin: Tuscan people (Traditional Tuscan cuisine) — Tuscany, Italy
See full technique reference →During heating to ~70 °C chestnut starch gelatinizes, reducing viscosity and allowing butter droplets to disperse. The emulsification at ~60 °C, aided by whisking, creates a viscoelastic network stabilized by a small amount of xanthan gum. The resulting emulsion resists phase separation until cooled, provided temperature and moisture conditions are maintained.
Primary Reaction
Gelatinization of chestnut starch and emulsification of clarified butter
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