Boskoop (also called Goudrenet, Goudreinet or Goudreinnette) is an apple cultivar which originated in Boskoop, Netherlands, where it began as a chance seedling in 1856. Variants include Boskoop red, yellow and green. This rustic apple is firm, tart and fragrant. Greenish-gray tinged with red, the apple stands up well to cooking. Generally Boskoop varieties are very high in acid content and they can contain over four times the vitamin C of Granny Smith or Golden Delicious.