DELIVERS WITHIN 3-5 BUSINESS DAYS. THE WHITE BUTTON IS THE MOST FREQUENTLY USED OF ALL MUSHROOMS. ALSO, CALLED CHAMPIGNON, THEY 'VE BEEN CULTIVATED BY THE FRENCH SINCE THE 1700 'S. TODAY, THE UNITED STATES IS THE LARGEST GROWER OF CULTIVATED WHITE BUTTON MUSHROOMS. THE "CHAMPIGNON" RETAINS ITS SHAPE WELL WHEN COOKED, ALTHOUGH THEY DO SHRINK A LITTLE IN SIZE. THE "CHAMPIGNON" HAS A MILD FLAVOR AND FIRM TEXTURE AND COMES IN SLICED FORM. THE "CHAMPIGNON" ABSORBS FLAVORS WELL IN ANY DISH.