White Zinfandel is the name of the inexpensive blush-style wine created in California during the 1970s, as a result of a surplus of red Zinfandel grapes and a shortage of white wine grapes. At the time, Americans were drinking more white wine than red, so as both a marketing ploy and means of meeting the high demand, a "white" wine was made from Zinfandel grapes. Technically, White Zinfandel is not a white wine at all but a "blush" wine, since it is made from red grapes. During the winemaking process, the dark Zinfandel grape skins are removed from the juice as soon as the grapes are pressed, resulting in wine with a slight pinkish color, little character, and (more often than not) plenty of residual sugar. Some White Zinfandels were further enlivened with the addition of a small amount of carbon dioxide (to add fizz) and other, more aromatic wines such as Riesling or Muscat. Bob Trinchero of Sutter Home is largely credited with starting the White Zinfandel revolution, and to this day it's still the winery's best selling wine, cranking out a whopping five million cases a year.