Mateo Flecha's music was published in part by Fuenllana in his "Orphenica Lira". The majority of his works can be found in the Cancionero of the Duke of Calabria (Venice, 1556), also known as the “Cancionero de Uppsala.” Flecha is best known as composer of the "ensalada" (literally "salad"), a work for four or five voices written for the diversion of courtiers in the palace. The ensalada frequently mixed languages: Spanish, Catalan, Italian, French, and Latin. In addition to the ensalada, Flecha is known for his villancicos.