Alexandra Maria Guarnaschelli (born 1972) is a chef and executive chef at New York City's Butter restaurant and was executive chef at The Darby restaurant before its closing. She appears as a television personality on the Food Network shows Chopped, Iron Chef America, All Star Family Cook-off, Guy's Grocery Games, and The Best Thing I Ever Ate. She hosts Alex's Day Off and The Cooking Loft on Food Network and Cooking Channel. In 2012, she won that season of Iron Chef America. In 2013, Guarnaschelli's first cookbook was published.