Crème pâtissière is the workhorse of French pâtisserie — the filling that appears in virtually every category of pastry from éclairs to mille-feuille to fruit tarts. Its history is inseparable from the history of French pastry itself. The technique is fundamentally about starch gelatinisation: cooking a custard past the point where eggs alone would coagulate, using starch to create a stable, sliceable gel.
A cooked custard thickened with starch (flour, cornstarch, or a combination) to a consistency that holds its shape when piped or spread. Unlike anglaise, pastry cream must be brought to a full boil to fully cook out the starch — a step that would curdle an unstabilised egg custard but is safe here because the starch protects the proteins from heat coagulation.
Pastry cream is intentionally neutral — vanilla is the standard flavour because it reads as background. It carries other flavours (coffee, chocolate, praline, citrus) without competing with them. Its function is textural: soft enough to yield to a fork, stable enough not to flow. Too sweet and it overwhelms fillings; too little sugar and it reads as bland.
- The starch must be cooked out completely — undercooked pastry cream tastes floury and raw, and breaks down during storage as ungelatinised starch absorbs water unevenly. A full boil (with constant stirring) for 1–2 minutes after thickening is required [VERIFY time] - Eggs must be whisked with sugar and starch before hot milk is added — this tempering step prevents scrambling - The hot milk must be added in a thin stream with constant whisking — too fast and the eggs scramble before the starch can protect them - Butter added off heat (the liaison) gives gloss, richness, and a slight preservation effect - Immediate coverage with plastic wrap directly on the surface prevents a skin from forming as the cream cools Decisive moment: The boil — when the cream comes to a full, bubbling boil and is held there for 1–2 minutes with constant stirring. The cream will thicken dramatically, then loosen slightly during the boil as the starch granules fully rupture. This loosening is the signal that gelatinisation is complete. Sensory tests: - Properly cooked: smooth, shiny, thick enough to hold a ribbon for 5 seconds when a spoonful is dropped back into the pan - Starch cooked out: no floury taste, cream holds its shape when piped, no graininess - Stored correctly: no skin, no liquid separation at the bottom
- Removing from heat at first signs of thickening — starch is not fully cooked, producing grainy texture and poor shelf life - Insufficient whisking during the boil — cream scorches on the base - Cooling too slowly — bacterial growth in the temperature danger zone (60–4°C) - Adding butter when cream is too hot — it separates rather than incorporating - Not covering with plastic wrap — skin forms, creating lumps when the cream is used
PASTRY TECHNIQUES — Block 1