Hannah Allgood was born in Holborn, London. The letters she wrote to her father's sister Margaret Widdrington are the major source of information about her personal life. Hannah married Peter Glasse, with whom she had eight children. The couple held positions in the household of the Earl of Donegal at Broomfield, Essex, and appear to have lived in London after that.
Mrs. Glasse may have worked in the household of Augusta, Dowager Princess of Wales (mother of King George III). Hannah’s book The Art of Cookery Made Plain and Simple, which achieved tremendous popularity, was the first-ever cooking guide published by an Englishwoman, and remained continuously in print until 1824. Her other works were The Compleat Confectioner (c. 1770) and The Servant’s Directory or Housekeeper’s Companion (1760). In 2006, she was the subject of a BBC documentary that called her "the mother of the modern dinner party."