Graskaas is a cheese created from the first milkings after cows have spent the winter inside and are led to pasture. This milk is rich and makes a mild-flavored and creamy cheese; cheese prepared from milk produced by indoor cows is known as hooikaas, or “hay cheese.” Meikaas, or “May cheese,” is identical to graskaas but is aged for a shorter period of time. Graskaas is usually available in early summer, but due to an unusually warm spring in 1596, graskaas was available in the Delft market on March 28.