Paella is Spain's best known export, but the dish most people picture bears little resemblance to how it started. It began as a simple rice cooked by field workers in Valencia, and its journey from marshland to fishing village to Sunday family table explains a lot about how it's cooked today.
Rice arrived on the Iberian Peninsula in the 8th century with the Moorish conquest, and the marshy wetlands around Valencia's Lake Albufera were gradually drained and turned into rice paddies. The region became the centre of Spanish rice growing, cultivating short grain varieties such as Bomba and Senia that absorb liquid well without turning to mush.
By the 18th century, labourers working the rice fields and orange groves built fires outdoors using vine cuttings. Over the open flame they cooked rice in shallow iron pans with whatever was to hand: water, garlic, tomatoes, snails and wild rabbit. The name paella comes from the Old French word paelle, itself from the Latin patella, which refers to the broad, shallow pan used to cook it, not the food inside it.
In Valencia, paella has traditionally been a Sunday dish, cooked outdoors by the men of the family while everyone else gathered around and waited. The pan itself, rather than individual plates, was often the serving dish. Families ate straight from it, working inward from the edges toward the middle.
Getting to the socarrat, the crisped rice at the bottom of the pan, was treated as a small prize, and friends and family would compete good naturedly for the last spoonful of it. As paella spread beyond Valencia through the 20th century, first across the rest of Spain and then into restaurants and package holidays abroad, it kept this communal character. It's rarely a dish for one person. It's built to be cooked in one pan and shared straight out of it.
Whichever version of paella you're cooking, two things matter more than any single ingredient.
Paella needs to be cooked in a thin layer so the liquid evaporates quickly, letting the rice absorb the stock without boiling into something closer to a porridge. This is the whole reason the traditional pan is so wide and flat.
Unlike risotto, which relies on constant stirring to release starch and build a creamy texture, paella rice is left alone once the stock goes in. That stillness lets the grains swell individually and absorb the surrounding flavour, and it's also what allows a layer of rice at the bottom to catch and crisp into socarrat, the toasted, faintly smoky layer that Spanish families consider the best part of the pan.
Ask someone from Valencia what belongs in a paella valenciana and you might be surprised: no seafood at all. The traditional inland version is built on rabbit, chicken and broad beans, seasoned simply with rosemary, saffron and paprika.
As the dish spread to the coast, fishermen adapted the same technique to what they had on hand. Game meat was replaced with the day's catch, prawns, squid, cuttlefish and monkfish, and water was swapped for a proper fish stock. This coastal version, paella de marisco, is now what most people outside Spain picture when they hear the word paella.
The dish has kept adapting since. A traditional seafood paella built from scratch, with its own stock and fresh shellfish, is a proper weekend project. A quicker seafood version using good stock pots and frozen prawns and squid can land on the table on a Tuesday in under 40 minutes. Neither of these is a lesser version of the other, and neither is chorizo, which isn't part of paella valenciana at all but has become a common addition outside Spain for its colour and smoky flavour. All of it sits under the same name because the technique, not any one ingredient list, is what actually defines the dish.
Paella valenciana is the original inland version, made with chicken, rabbit and beans and no seafood at all. Seafood paella developed later along the coast, as fishermen swapped meat for the day's catch and water for fish stock, and it's now the version most people outside Spain think of as paella.
Once the stock goes in, the rice is left undisturbed so each grain can absorb liquid evenly and a crisp layer can form at the bottom of the pan. Stirring releases starch and turns the rice creamy, which is exactly right for a risotto and exactly wrong for a paella.
Not in Valencia. Classic paella valenciana is built on chicken, rabbit and beans, with no cured sausage in sight. Chorizo became common in versions cooked outside Spain, where it adds colour and a smoky, paprika heavy flavour that people associate with Spanish cooking generally.
A traditional paellera helps because it's wide and shallow, which is exactly what the rice needs, but any wide, shallow pan or a large frying pan does the same job at home. What matters more than the pan itself is leaving the rice alone once the liquid goes in.