Pâtisserie · Article 07

Pâtisserie Creams & Meringues

A reference article · 3,300 words · 18 cited sources · last reviewed August 2026

Every cream in pâtisserie descends from a couple of parent preparations by adding one thing: fat, gelatin, aerated egg, whipped cream, or chocolate. Learn the parents and the five mechanisms, and two hundred named creams collapse into a handful of moves.

A pastry kitchen seems to run on an endless list of creams, each with its own French name and its own rules. It doesn’t. Nearly all of them come from two parents, crème anglaise and crème pâtissière, transformed by adding a single element, and all of them hold their shape by one of five mechanisms. Name the mechanism and you know the temperature to hit, the way it fails, and the fix. This article is that grammar.

The five setting mechanisms

Before the family tree, the physics. Every cream in this article holds together by one mechanism or a deliberate stack of them, and knowing which one is at work is the whole of troubleshooting.

Egg-protein coagulation. Egg proteins unfold and link into a mesh as they heat. Yolk proteins begin thickening a liquid near 149°F (65°C) and set firm around 158°F (70°C); whites coagulate at 144 to 149°F (62 to 65°C); a whole-egg custard sets at 176 to 185°F (80 to 85°C) (McGee, 2004). Overshoot and the mesh contracts and squeezes out its water, which is curdling. Starch gelatinization swells and bursts starch granules across 144 to 176°F (62 to 80°C), and full thickening needs a boil (Figoni, 2011). Gelatin is a reversible gel that dissolves above about 122°F (50°C), sets below about 59°F (15°C), and melts near body temperature, the source of gelatin’s clean melt-away finish. Fat aeration beats air into solid fat to build a foam of fat-coated bubbles, the structure of buttercream and whipped ganache. And emulsion disperses fat as fine droplets through a water phase: ganache, crémeux, and curd are emulsions, and they fail by breaking and are saved by re-dispersing the fat.

Most creams combine these. Pastry cream is starch plus egg coagulation; bavarois is egg coagulation plus gelatin plus fat aeration; a crémeux is egg coagulation plus emulsion. The temperature ladder below is the map for the egg-set members; learn it by feel.

The custard line: crème anglaise and its children

Crème anglaise is the stirred pouring custard, milk and cream cooked with egg yolks and sugar, with no starch. A classic ratio is 1 L milk to 8–12 yolks to 200–250 g sugar (Friberg, 2002). Because egg protein alone sets it, it is fragile: thickening begins near 172°F (78°C), reaches nappe, when it coats the back of a spoon, at 180 to 184°F (82 to 84°C), and curdles above roughly 185°F (85°C) (Valrhona). The method protects that narrow window at every step. Scald the milk, blanch the yolks with the sugar (the sugar raises the coagulation temperature and widens the safety margin), temper the hot milk into the yolks, then stir constantly over medium heat to nappe and strain onto a cold bowl over ice the instant it arrives. Until the eye is trained, use a probe.

Anglaise is a raw-egg-adjacent, low-acid, high-protein liquid that never reaches a pasteurizing hold, so treat it as a hazard: cool it fast through the danger zone, refrigerate at or below 40°F (4°C), and use it within two to three days. If it does curdle, pull it off the heat, pour it into a cold bowl, and blend it hard with an immersion blender; the mechanical shear re-disperses the coagulated protein and the sauce reads smooth again, if slightly thinner.

From that one parent, a single addition makes each child. Add bloomed gelatin and an equal volume of lightly whipped cream and you have bavarois, a triple stack of egg coagulation, gelatin, and fat aeration: dissolve the gelatin into the warm anglaise, cool to the setting point near 68 to 75°F (20 to 24°C) where it has thickened but not gelled, fold in the cream, and mold. Timing is tight: fold too warm and the cream deflates, too cold and the gelatin seizes. Churn a richer anglaise while freezing and you have an ice cream base, where sugar and fat depress the freezing point and yolk lecithin emulsifies. Emulsify an anglaise into chocolate and you have a crémeux. The anglaise also has a syrup-cooked cousin, the pâte à bombe: yolks whipped while a 244 to 250°F (118 to 121°C) sugar syrup is streamed in, beaten to a pale cooled ribbon. That cooked-yolk foam is the yolk analog of Italian meringue, the syrup pasteurizes the eggs, and it is the base of French buttercream and many mousses.

The pastry cream line: crème pâtissière and its derivatives

Crème pâtissière adds the one ingredient anglaise lacks: starch. Milk, yolks, sugar, cornstarch or flour, and a finishing knob of butter, at a benchmark of 1 L milk to 8 yolks to 200 g sugar to 80–100 g cornstarch (Friberg, 2002). The starch is the key to the entire line. Dispersed through the custard, it physically separates the egg proteins and raises the temperature at which they would over-coagulate, so pastry cream can be brought to a full boil at 212°F (100°C) without scrambling, where a starch-free anglaise curdles above 185°F (85°C) (Figoni, 2011).

That boil is not optional, for two reasons. Starch only reaches full thickening at the boil, so an undercooked pastry cream is thin and tastes of raw starch. More surprising, egg yolks carry alpha-amylase, a starch-digesting enzyme, and if the cream never boils the residual amylase keeps cutting the starch chains for hours afterward, so the cream turns soupy in the fridge overnight. Boiling for one to two minutes with vigorous whisking denatures the enzyme and locks the set (Edible Molecules, 2017). Cornstarch gives a cleaner flavor and more gloss and thickens harder per gram but thins more easily; flour is more stable and forgiving but heavier and duller; a blend splits the difference.

Then the derivatives follow the same one-addition logic. Beat cooled pastry cream with soft butter at 25 to 50% of its weight and you get crème mousseline, a rich, structural “pastry-cream buttercream” for the Fraisier and, with praliné, the Paris-Brest. The butter and the cream must be at the same temperature, near 68 to 72°F (20 to 22°C), or the emulsion breaks, and a split mousseline is rescued by gently warming a portion and re-whipping. Fold in whipped cream instead and you get crème légère; add gelatin to that and it becomes crème diplomate, which holds a pipe and a mold. Fold warm gelatin-stabilized pastry cream with hot Italian meringue and you get crème chiboust, the soufflé-light historic crown of the Saint-Honoré, fragile and best used the day it is made.

Buttercreams

Every buttercream is a fat-aeration and emulsion system: soft butter beaten to a foam and carrying a base of egg, syrup, meringue, or pastry cream. One rule governs all of them: the butter goes in near 68 to 72°F (20 to 22°C), into a base cooled to the same range. A temperature mismatch is the commonest cause of soup or curds. The six styles trade sweetness, richness, and stability:

When a buttercream breaks, the cause is almost always temperature, and the direction of the fix depends on how it looks (King Arthur Baking, 2025). If it is soupy and won’t come together, the base or butter is too warm: refrigerate the bowl for 10 to 15 minutes and re-whip, and keep beating even though it looks broken partway through. If it is curdled and cottage-cheese-like, the butter was too cold or added too fast: gently warm the bowl until about a third liquefies, then whip hard to re-emulsify. The cause is heat; the fix is patience.

Ganache: emulsion science

Ganache is not melted chocolate stirred into cream. It is a structured emulsion, cocoa butter and milk fat dispersed as fine droplets through a water phase and stabilized by cocoa solids, milk proteins, and lecithin (Valrhona). Every failure follows from that. Its texture is set by the ratio of chocolate to cream, and because usable structure comes from the non-fat cocoa solids, milk chocolate needs about 50% more chocolate and white roughly double to reach the same firmness.

Make it by pouring boiled cream over chopped chocolate in stages and stirring from the center outward to a glossy nucleus, or, better, blending it smooth with an immersion blender; add any butter only at 95 to 104°F (35 to 40°C) so it emulsifies instead of greasing out. A ganache breaks when the fat exceeds the water phase’s capacity to hold it, turning oily and grainy, from cream too hot, too much fat, overmixing, or a cold shock. The rescue runs backward: blend in a little warm cream or milk, a tablespoon at a time, which restores the continuous water phase so the fat can re-disperse. Adding glucose or invert sugar binds water, lowers water activity for shelf stability, and suppresses sugar crystallization for a glossier, longer-keeping ganache; filled bonbons keep for weeks while a plain cream ganache is a two-to-three-day product. The whipped form, ganache montée, is a light-ratio ganache chilled overnight so the fat crystallizes, then whipped like cream; overwhipping breaks it into grainy butter, so whip it cold, stop at soft peaks, and use it at once.

The crémeux and namelaka

Two modern emulsion-set creams deserve a note, because they show the grammar extending into contemporary pastry. A crémeux is most often a crème anglaise cooked to nappe, poured over chocolate, and immersion-blended to a perfect emulsion, then chilled: denser than a mousse, softer than a ganache, a rich plated component. Namelaka, Valrhona’s “ultra-creamy” set, blends hot milk, glucose, and bloomed gelatin over chocolate, then blends in cold cream and rests overnight so the fat and gelatin organize. The result is smooth and glossy and holds a piped quenelle without being stiff. Both, like firm ganache, can be frozen into inserts and placed inside an entremets before glazing, where they slice cleanly frozen and thaw to their intended texture.

The meringues

A meringue is a foam of air in a protein-and-sugar matrix. Egg-white proteins unfold at the surface of each bubble and link into a film, while sugar dissolves into the water phase, thickens it, slows the drainage that collapses a foam, and sharply raises stability, so more sugar gives a denser, glossier, more durable meringue. Three methods trade stability for ease:

Stability runs Italian, then Swiss, then French (MasterClass). The cooked meringues fully dissolve their sugar and pasteurize the whites, which matters for any meringue used without further baking, such as a buttercream or a pie topping. Two chemistry levers tune the foam. A trace of acid, cream of tartar or a little lemon, shifts the pH toward the proteins’ optimum, raising volume and reducing collapse and weeping. And fat is the enemy: a speck of yolk or a greasy bowl coats the proteins and prevents the film from forming, so the whites will not whip. Work in a scrupulously clean, degreased bowl with perfectly separated whites.

From those three meringues comes a whole catalog. Fold French meringue with almond flour and powdered sugar (macaronage) for macarons, or with ground nuts for dacquoise. Bake a large French meringue with a little cornstarch and vinegar for a pavlova, crisp outside and marshmallowy within. Sheath ice cream on sponge in Italian or Swiss meringue and flash-brown it for a baked Alaska, where the meringue’s trapped air insulates the ice cream. Set an Italian meringue with gelatin and invert sugar and you have marshmallow, one gelatin addition from a plain meringue, exactly mirroring how bavarois sits one gelatin addition from anglaise.

The grammar in one paragraph

Learn two parents and five verbs. Crème anglaise, egg-set at 180 to 184°F (82 to 84°C), becomes bavarois with gelatin and whipped cream, crémeux with chocolate, and ice cream with churning, while its syrup-cooked cousin the pâte à bombe underlies French buttercream. Crème pâtissière, starch-and-egg-set and boiled, becomes mousseline with butter, diplomate with whipped cream and gelatin, and chiboust with Italian meringue. Running alongside, the emulsion creams, ganache and crémeux and namelaka, are cocoa butter dispersed in a water phase and rescued the same way, with warm liquid and a blender; and the aerated foams, Chantilly and sabayon and the three meringues, are air trapped by protein and held by sugar or crystallized fat. Every troubleshooting decision reduces to one question: which of the five mechanisms is failing.