Cajun cuisine (French: cuisine cadienne [kɥi.zin ka.dʒɛn], Spanish: cocina acadiense) is a style of cooking developed by the Cajun–Acadians who were deported from Acadia to Louisiana during the 18th century and who incorporated West African, French and Spanish cooking techniques into their original cuisine.

Cajun cuisine is sometimes referred to as a 'rustic cuisine', meaning that it is based on locally available ingredients and that preparation is relatively simple.

An authentic Cajun meal is usually a three-pot affair, with one pot dedicated to the main dish, one dedicated to steamed rice, specially made sausages, or some seafood dish, and the third containing whatever vegetable is plentiful or available. Crawfish, shrimp, and andouille sausage are staple meats used in a variety of dishes.

The aromatic vegetables green bell pepper (piment doux), onion, and celery are called "the trinity" by chefs in Cajun and Louisiana Creole cuisines. Roughly diced and combined in cooking, the method is similar to the use of the mirepoix in traditional French cuisine which blends roughly diced carrot, onion, and celery. Additional characteristic aromatics for both the Creole and Cajun versions may include parsley, bay leaf, thyme, green onions, ground cayenne pepper, and ground black pepper. Cayenne and Louisiana-style hot sauce are the primary sources of spice in Cajun cuisine, which usually tends towards a moderate, well-balanced heat, despite the national "Cajun hot" craze of the 1980s and 1990s.