What You Need to Know
The low‑temperature sous‑vide environment promotes controlled pectin hydrolysis, allowing the polysaccharide to depolymerize into soluble fragments that later gelatinize when the temperature is briefly raised. Simultaneously, the vacuum seal reduces oxygen exposure, preventing oxidative browning and preserving bright fruit aromatics. The final flash step at 80–85 °C drives sugar concentration to 18–22 % Brix, achieving the desired viscosity while minimizing caramelization.
The Science
Primary Reaction
Pectin hydrolysis and gelatinization