Sorbet is a dairy-free frozen preparation defined by the purity of its fruit or aromatic base, relying on sugar concentration and churning technique for texture rather than fat emulsification. The base consists of fruit purée or juice combined with a sugar syrup, adjusted to a total soluble solids reading of 28-32° Brix (measured by refractometer). This range is critical: below 26° Brix the sorbet freezes too hard and crystallises aggressively; above 34° Brix it remains sticky and fails to set. A standard syrup is prepared at 30° Baumé (equal parts water and sugar by weight, boiled to dissolve), then blended with purée to reach the target Brix. For wine or alcohol-based sorbets, the freezing point depression caused by ethanol must be offset by increasing sugar concentration or reducing alcohol to below 5% of the total mix. Adding 1-2% glucose powder or dextrose replaces a portion of sucrose, lowering sweetness perception while maintaining freezing point depression—essential for tart sorbets like cassis or passion fruit where excessive sweetness would overwhelm acidity. Acidity itself is managed: a pH of 3.2-3.8 produces the most vibrant flavour in fruit sorbets, adjusted with citric acid or lemon juice if needed. The mix is chilled to 4°C, then churned in a batch freezer to -8 to -10°C, targeting 20-30% overrun. Unlike ice cream, minimal air incorporation preserves the dense, clean mouthfeel. A small addition of stabiliser (1-1.5 g locust bean gum or guar gum per litre) dramatically improves shelf stability by binding free water and retarding recrystallisation during temperature fluctuations. After churning, the sorbet is packed and blast-frozen at -35°C. Service temperature of -12 to -14°C ensures scoopability without textural degradation.
Target 28-32° Brix for optimal texture and scoopability; use a refractometer to measure sugar concentration precisely; maintain pH of 3.2-3.8 for vibrant fruit flavour; churn to 20-30% overrun for dense, clean mouthfeel; blast freeze at -35°C to lock in fine crystal structure
Substitute 10-15% of sucrose with atomised glucose to reduce sweetness without altering texture; a tablespoon of vodka (per litre) lowers the freezing point for softer scoopability without detectable alcohol flavour; pass fruit purées through a fine tamis to remove fibres and seeds for the smoothest possible base; serve sorbet in chilled bowls or between courses as a palate cleanser (trou normand)
Relying on taste alone instead of measuring Brix, leading to inconsistent freezing behaviour; over-sweetening to compensate for flavour muting at cold temperatures, masking fruit character; not accounting for alcohol's freezing point depression in wine sorbets, producing slush; over-churning, incorporating too much air and producing a grainy, foamy texture; storing at fluctuating temperatures, causing ice crystal coarsening
Escoffier, Le Guide Culinaire; Corvitto, Los Secretos del Helado; Lenôtre, Lenôtre's Ice Creams and Candies