Germans are one of the largest ethnic groups of Argentina and have had one of the biggest impacts in the Argentine culture. The influence of their culture has also impacted Argentine cuisine; this trend is especially apparent in the field of desserts. The pastries known as facturas are Germanic in origin: croissants, known as medialunas ("half-moons", from German "Halbmond"), are the most popular of these, and can be found in two varieties: butter- and lard-based. Also German in origin are the "Berliner" known as bolas de Fraile ("friar's balls"), and the rolls called piononos.