The author of several bestselling cookbooks, including Gizzi's Kitchen Magic (2010) and Skinny Weeks and Weekend Feasts (2013), she is also notable for hosting Cookery School; Drop Down Menu; Cook Yourself Thin; and several other British television culinary programs.
She completed her culinary training at London, England's Leiths School of Food and Wine.
Early in her career as a chef and media personality, she adopted a punk persona. Later on, she became known for her 1960s-era clothing and hairstyles.
She spent the first two years of her life in Dumfries, Scotland, and the remainder of her youth in England.
She is a contemporary of fellow British celebrity chef Rachel Khoo.