Tracked by Evreward since 2005, Impromptu Gourmet offers coupons, cash back rebates and rewards, with savings as high as $25 off. Impromptu Gourmet discount coupons are rare, only available once or twice a year. Even when Impromptu Gourmet doesn't have a coupon, you can always get up to 6% cash back, and other great rewards, with every purchase.