The etymology of meringue is, appropriately enough, as light and insubstantial as the confection itself — no one knows for certain where the word comes from. It entered English from French meringue in the early 18th century, but the French word's own origin is disputed among several competing theories, none entirely convincing.
The most popular theory traces the word to the Swiss town of Meiringen in the Bernese Oberland, where an Italian pastry chef named Gasparini is said to have invented the confection around 1600. According to this account, German speakers called the creation Meringergebäck (Meiringen pastry), which was shortened and adapted into French as meringue. The theory is appealing but lacks documentary evidence from the period.
An alternative etymology derives meringue from Latin merenda, meaning afternoon snack or light meal (the same root as the English merienda borrowed from Spanish). This theory connects the confection to its function as a light between-meals treat, but the phonological development from merenda to meringue is not straightforward.
A third theory, largely discredited but persistent, links the word to Polish marzynka, supposedly made by a chef for King Stanisław I of Poland and later introduced to the French court through his daughter Marie Leszczyńska, who married Louis XV in 1725. The dates are problematic, however, as meringue appears in French cookbooks before this period.
What is certain is that meringue was well established in French cuisine by the late 17th century. François Massialot's 1692 cookbook Nouvelle instruction pour les confitures contains a recipe for meringue, and the confection quickly became a foundation of French pâtisserie.
The science of meringue is remarkably precise. Egg whites are a solution of water and proteins, primarily ovalbumin. When beaten, the proteins unfold and form a network that traps air bubbles, creating a stable foam that can expand to eight times the original volume. Sugar, added gradually during beating, strengthens this protein network and draws
Three distinct styles of meringue have developed in culinary tradition: French meringue (raw sugar beaten into whites, then baked), Swiss meringue (whites and sugar heated together over a bain-marie, then beaten), and Italian meringue (hot sugar syrup poured into beaten whites). Each produces different textures and serves different culinary purposes.