Custards, creams & meringues
crème pâtissière
crème pâtissière · A starch-thickened vanilla custard — the foundational French pastry cream used to fill éclairs, mille-feuille, tarts, choux, and profiteroles. Distinguished from crème anglaise (egg-thickened) by the addition of starch, which gives it a thick, pipeable consistency that holds its shape under frosting or glazing. It is a component, not a finished dish.
The formula
whole milk 1000 g : granulated sugar 200 g : egg yolks 6 (≈120 g) : potato starch 60 g (or wheat flour 80 g)
Scale all ingredients proportionally. Potato starch swells more efficiently than wheat flour — flour-based versions require approximately 25–30% more starch equivalent. Reduce sugar to 150 g for a less sweet, more neutral base.
Identity
- Always thickened with starch (potato/corn/wheat), never egg alone
- Vanilla bean (or high-quality extract) is the defining flavor — not chocolate, not fruit
- Must be cooked to a full, rolling boil to fully gelatinize starch and destroy amylase inhibitors that would liquify the cream on standing
- Plastic film pressed directly on the surface during cooling — no skin, no lid
- Strained immediately while hot to achieve a perfectly smooth, lump-free consistency
Ingredients
| Liquid | whole milk (3.5–4% fat) | Full-fat milk is non-negotiable; lower fat produces a thin, watery cream. Cream may replace up to 25% of the milk for richness. |
| Flavor | vanilla bean (or 2 tsp high-quality extract) | Split and scraped beans infuse in the milk. Paste or extract acceptable but inferior. One vanilla bean per litre. |
| Thickener | potato starch or wheat flour | Potato starch yields a cleaner, more tender result; wheat flour produces a slightly heavier, more resilient structure. Cornstarch substitutes 1:1 by weight. |
| Thickener | egg yolks | Provide richness, colour, emulsification, and additional thickening. 6 yolks per litre of milk is standard. |
| Sweetener | granulated sugar | Sweetens and contributes to texture and browning. Reduce for a less sweet cream; increase sparingly — sugar above ~25% of the liquid weight makes the cream hygroscopic and unstable. |
| Flavor | fine salt (pinch) | A small pinch sharpens the vanilla flavour and rounds the sweetness. |
Method
- 1Combine milk, split vanilla bean (with scraped seeds), and salt in a heavy saucepan. Heat over medium until just steaming (≈85 °C). Cover and steep off heat for 10 minutes.Gentle infusion extracts vanillin without scorching the milk. Steeping off-heat maximises flavour extraction without evaporation loss.
- 2Whisk egg yolks and sugar together in a separate bowl until slightly pale and combined (~1 minute). Add potato starch and whisk to a smooth, thick paste.Beating yolk and sugar together dissolves sugar and begins emulsification. Adding starch at this stage creates a dispersion matrix that prevents lumps when hot milk is introduced.
- 3Remove vanilla bean from milk. Gradually pour the hot milk into the yolk mixture in a thin stream, whisking constantly to distribute temperature evenly and prevent scrambling.Tempering raises the yolk temperature gradually. A thin stream and constant motion ensure no localised overcooking of the protein matrix.
- 4Return the entire mixture to the saucepan. Cook over medium heat, stirring continuously with a wooden spoon or whisk, until the cream reaches a full, bubbling boil — maintain at the boil for 1–2 minutes.Full boiling is the critical safety and texture threshold: it completes starch gelatinization, destroys naturally occurring amylase that would liquify the cream on standing, and ensures the yolk proteins set enough to support the starch gel.
- 5Strain through a fine-mesh sieve into a clean, wide container. Immediately press a sheet of plastic film directly onto the surface so it makes contact with the cream with no air trapped.Straining removes any bits of cooked egg and vanilla fragments. Plastic film prevents condensation from dripping back into the cream (which causes skin) and protects the surface from oxidation.
- 6Cool rapidly in an ice bath to below 20 °C, then refrigerate. Use within 48 hours.Rapid cooling halts residual cooking. Below 20 °C the starch gel sets to its final firm texture. Below 5 °C, bacterial growth is suppressed.
Techniques that matter
Starch gelatinization
Potato starch granules swell and burst at 58–67 °C, absorbing liquid and forming an irreversible gel. Full boiling ensures complete gelatinization; insufficient heat leaves starch grains intact and the cream thin and chalky.
Egg tempering
Adding hot liquid gradually prevents egg proteins from coagulating prematurely. The starch in the mixture also buffers temperature spikes, making the tempering step more forgiving than with a plain egg custard.
Starch retrogradation (storage)
On refrigeration, amylose molecules in the starch gel realign and crystallise, causing the cream to stiffen overnight — this is normal and resolves on gentle reheat. Over-stiffening indicates excessive starch or insufficient fat.
Variations & derivatives
crema pasticceraItaly
Adds 30 g butter stirred in after cooking and 1 whole egg for a richer, more buttery texture. Often includes a small amount of limoncello or orange zest. Slightly softer set than the French version.
VanillecremeGermany / Austria
Uses only 40 g wheat flour per litre and 4 egg yolks, producing a lighter, softer cream closer to a thick crème anglaise in body. Standard filling for German Torten.
crème diplomateFrance
Folded with 200–300 g stiffly whipped cream (≈ 30% of cream weight) after cooling to 30 °C. Significantly lighter and more aerated while retaining structure. Used in verrines and lighter Parisian pastry.
Used in these dishes
Substitutions
- potato starch → cornstarch (maïzena) — Substitute 1:1 by weight. Cornstarch produces a slightly more translucent, glossy gel and a marginally firmer set. Flavour and texture are nearly indistinguishable in pastry use.
- wheat flour (type 55) → potato starch — Replace at ~75% weight — flour requires more mass to achieve equivalent thickening because it contains less pure starch (≈ 75% vs. potato's ~80–85%).
- whole milk → semi-skimmed milk — Reduces fat content significantly; the cream will be thinner and less rich. Acceptable for diet versions; inadvisable for classical pastry.changes result
Troubleshooting
Grainy, scrambled-egg texture despite tempering
Direct addition of too-hot milk to yolks without gradual mixing, or cooking continued after the cream broke (seized). The protein matrix has coagulated irreversibly. → If caught early (before boiling), strain immediately. If the cream is severely broken, it cannot be rescued — discard and start fresh. Ensure the milk is below 90 °C before the first addition to yolks.
Cream is too thin and does not set
Insufficient starch — the starch weight is below the gelatinization threshold needed to form a stable gel at the given liquid volume. Undercooking (not reaching full boil) is the most common cause. → Dissolve additional starch in cold water (1:3 ratio) and whisk it into the hot cream; reboil for 1 minute. Alternatively, whisk 1 tbsp potato starch into a portion of cold cream, then combine with the thin batch and reheat.
Hard, rubbery layer on surface after refrigeration
Skin formed from exposure to air and evaporating condensation. Also occurs if the cream was covered with a lid rather than plastic film pressed to the surface — water droplets pool and wet the surface, concentrating starch. → Scrape off the top 2–3 mm layer. To prevent: always press plastic film directly onto the surface. Reheat gently, stirring, to restore a smooth consistency.
Cream weeps liquid (syneresis) after standing 12–24 hours
Starch was over-cooked (above 100 °C for too long), degrading the amylose matrix and causing it to contract and squeeze out water. Also occurs with excessive sugar (> 25% of liquid weight) which makes the gel hygroscopic. → Gently reheat, whisking in a splash of cold milk or a starch slurry to rebuild the gel. Use within 24 hours of this correction.