The five recipe columns and two food features she wrote for the Associated Press each week appeared in papers all over the United States, in addition to a number of other countries.
Brownstone was also a consultant to Carl Sontheimer, president of Cuisinart, a physicist, entrepreneur, and founder of the food processor industry in America.
With Sontheimer, Brownstone edited the highly regarded magazine, Pleasures of Cooking, and wrote Classic Cakes and Other Great Cuisinart Desserts in 1994.
Brownstone's collection includes signed, inscribed copies of almost every edition of Joy of Cooking, sent to her first by Irma Rombauer, and later by Marion Becker.
Brownstone's "success derived, in my view, from her sensitivity to readers' tastes and her insistence that recipes give high, appealing results."