A Spanish omelette or Spanish tortilla (, , or ; see below) is an omelette made with eggs and potatoes, often including onions. It is often served at room temperature as a tapa. It is one of the most popular dishes in Spanish cuisine.
The first reference to the tortilla in Spanish is found in a Navarrese document, as an anonymous "mousehole memorial" addressed to the court of Navarre in 1817. It explains the poor conditions of Navarre's farmers in contrast with those in Pamplona (the capital) and La Ribera (in southern Navarre). After listing the sparse food eaten by highlanders, the next quote follows: "...two to three eggs in tortilla for 5 or 6 [people] as our women know how to make it big and thick with fewer eggs, mixing potatoes, breadcrumbs, or whatever".
According to legend, during the 1835 siege of Bilbao, Carlist General Tomás de Zumalacárregui invented the as an easy, fast, and nutritious dish to satisfy the scarcities of the Carlist army. Although it remains unknown whether this is true, it appears the tortilla started to spread during the early Carlist Wars.
Another tale is that the recipe was learned by Spanish prisoners captured after the Battle of Montes Claros during the Portuguese Restoration War in 1665. After the Portuguese victory, more than 6,000 Spanish soldiers were kept in captivity for three years, until the Treaty of Lisbon of 1668 was signed. Upon their release, these prisoners brought part of the culture of Alentejo to Spain, including many recipes, which included a potato egg pie that evolved into the modern version of the "tortilla".
The word , which is the diminutive form of , literally means 'small cake' or 'small pie'. In European Spanish and in some variants of Latin American Spanish, it means omelette. A potato omelette is a or .
As the dish has gained international popularity, and perhaps to distinguish it from the thin flatbread made out of wheat or maize popular in Mexico and Central America, the or 'Spanish' naming gained traction. As such, 'Spanish omelette' or 'Spanish tortilla' are its common names in English, while is the formally accepted name even within the Iberian Peninsula. In Spain, an omelette (made simply of beaten eggs) is known as (), to distinguish it from the local potato version.
The preparation is also known by other names in the languages of SpainâÂÂ; ; ; /; .
The inclusion of onions in the tortilla is divisive, pitting (the "with onion" group) against ("without onion"). In 2018, the council of Betanzos, which hosts an annual omelette competition, stipulated that entrants may only use potatoes, oil, egg, and salt. In 2021, a survey by the Spanish newspaper El Mundo found that 72.7% of those surveyed preferred Spanish omelettes with onions.
The most common way to cook a Spanish omelette is as follows:
The omelette may be eaten hot, at room temperature, or chilled; it is commonly served, cut into bite-sized pieces (), as a tapa, or cut into wedges.
('tortilla day') is a popular festivity celebrated in many towns in southern and western Spain. Its date varies depending on the town. However, it normally coincides with the Thursday before Lent, the first day of Carnival, also known as (Fat Thursday). Many towns in eastern Spain have a similar celebration on that day. Traditionally, the inhabitants of each town go to a nearby rural area, where they spend the day with family members and friends, eating Spanish tortillas and other foods, and playing games.