Fondant meaning: start by asking which one
The fondant meaning depends entirely on which of three things is being discussed, and they share nothing beyond sugar. The word comes from fondre, to melt, and it was applied separately to each, which is why no single definition of fondant is correct.
| Term | Sense | What it is |
|---|---|---|
| fondant (sugar paste) | 1 of 3 - the cake covering | A pliable sugar dough rolled out and draped over a cake. Sugar, water, glycerine. |
| fondant patissier | 2 of 3 - the poured glaze | A white poured glaze, warmed to a flowing consistency, used on eclairs and mille-feuille. Also called fondant blanc or poured fondant. |
| fondant au chocolat | 3 of 3 - the cake | A small baked chocolate cake with a deliberately unset, flowing centre. Nothing to do with either fondant above. |
Fondant au chocolat: the cake
A small baked chocolate cake with a deliberately unset, flowing centre. NOT the same thing as fondant icing. In English it is usually called a molten chocolate cake or a chocolate fondant, and the defining feature is deliberate: the centre is meant to be unset, so the cake is pulled from the oven while the middle is still liquid. That makes it the one preparation in the three where underbaking is the goal rather than a fault.
It follows that timing rather than temperature is the whole difficulty. A minute either side changes the product: too little and the walls will not hold when it is turned out, too much and it is simply a small chocolate cake. Nothing about a fondant au chocolat has any relationship to the sugar preparations below, despite the shared name.
The name collision is worth knowing about for a practical reason. Searches for whether fondant is gluten free are almost always about the sugar covering, while a page about the cake answers a different question, and a fondant au chocolat normally does contain wheat flour, which is the opposite of the answer for the covering.
Rolled fondant: the covering
The pliable sugar covering rolled over cakes - sugar, water and glycerine. It is the pliable sheet draped over a celebration cake to give a smooth surface, and it is also sold as sugar paste or fondant icing. It is a sugar dough rather than an icing in any liquid sense, and it is worked like pastry: rolled out, lifted and smoothed down.
On the gluten question, since it is the one most asked of this sense: it is gluten-free in principle, being sugar, water and glycerine. Three real caveats apply. Commercial brands add flavourings, colourings and stabilisers that may carry gluten. Shared production facilities are a genuine risk for anyone coeliac. And “glucose syrup from wheat” appears on many labels and is considered safe for coeliacs, so it is not by itself a reason to reject a product.
Fondant patissier: the poured glaze
The third sense is the one least known in English. Fondant pâtissier, also called fondant blanc or poured fondant, is a white glaze warmed to a flowing consistency and poured or spread thinly, and it is what gives an éclair or a mille-feuille its opaque, faintly shiny top.
It carries the only hard number in this whole family, and it matters: work it warm, to about 37 °C, and never above. Past that it loses its shine and dries dull, which cannot be corrected afterwards. Some references work it cooler, around 32 °C, with a little sugar syrup to loosen it. Loosen with syrup rather than with water, because water thins it but takes the gloss with it.
One historical note that makes the collision easier to remember than treating it as an accident. All three senses descend from the same idea of working sugar as it cools, and in older French usage fondant described a property rather than a product: something that melts in the mouth. The covering, the glaze and the cake were each named for that quality independently.
For a cook the practical rule is to check which sense is meant before following any instruction. A temperature is almost certainly about the glaze. A gluten question is almost certainly about the covering. A baking time is about the cake.
The three senses and the rest of the borrowed vocabulary are collected in the glossary.
Questions about fondant
What does fondant mean?
It depends which of three things is meant: a fondant au chocolat is a small baked chocolate cake with an unset centre; rolled fondant is the pliable sugar covering for cakes; fondant pâtissier is a white poured glaze for éclairs and mille-feuille. They are unrelated.
Is fondant gluten free?
The sugar covering is gluten-free in principle, being sugar, water and glycerine, but brands add flavourings and stabilisers that may carry gluten, and shared facilities are a real risk. Glucose syrup from wheat is considered safe for coeliacs. A fondant au chocolat, the cake, usually contains wheat flour.
Does fondant cake mean the covered cake or the molten one?
In English usage, a “fondant cake” is normally a cake covered in rolled fondant. A “chocolate fondant” is the molten-centred dessert. The word does the opposite jobs in the two phrases, which is the root of the confusion.
Why did my poured fondant dry dull instead of shiny?
It was probably worked too hot. Fondant pâtissier holds its shine up to about 37 °C and loses it above that, irreversibly. Loosen it with sugar syrup rather than water, which also takes the gloss.
How do you say cake in French?
Gâteau for a cake in general. Confusingly, the French word cake is also used, but for a loaf-shaped cake, such as a fruit cake or a banana loaf, rather than for a layered one.