La Mancha, Spain (Moorish introduction)
Spain is the world's largest producer of saffron — specifically the provinces of Toledo, Albacete, and Cuenca in La Mancha, where Crocus sativus has been cultivated since the Moorish introduction in the 10th century. The stigmas of 150,000 flowers are required to produce one kilogram of dried saffron — making it the world's most expensive spice by weight, and the flavour it provides — metallic, floral, slightly earthy, irreplaceable — is the defining thread connecting paella, arroz con pollo, cocido, gazpacho manchego, crema catalana, and dozens of other dishes. The technique of using saffron correctly — blooming in warm liquid to release the water-soluble flavour compounds before adding to a dish — is fundamental to Iberian cooking.
Bloom saffron in warm (not boiling) liquid for 15-20 minutes before use. The liquid takes on a deep golden colour — this is the indicator that the flavour compounds have been released. Use a small amount relative to the dish — 0.1-0.2g per portion is standard. Toasting threads briefly in a dry pan before blooming intensifies the flavour further. Saffron is most effective when the dish is not excessively salty — salt competes with saffron's delicate flavour.
La Mancha saffron (DOP designation) is the benchmark — longer threads, more intense colour, more complex aromatics than most imports. Toast the threads for 15-20 seconds in a dry pan until they just begin to smell aromatic, then bloom in warm water, white wine, or fish stock. A saffron-oil emulsion (saffron bloomed in warm olive oil) is used in some Catalan preparations to carry the flavour differently.
Adding saffron threads directly to the dish without blooming — up to 40% of the flavour is lost. Using too much saffron — more than 0.3g per portion tastes medicinal. Buying poor-quality saffron — the Iranian and Spanish designation matters enormously. Storing saffron in bright light or heat — the volatile aromatics dissipate within months.
The Food of Spain by Claudia Roden