I have two of her cookbooks, both dating from the ‘60s plus some of the booklets which accompanied her TV programmes. If you ignore the dotty and dated suggestions, such as colouring mashed potato green, there are some real gems there.
Her recipe for a fatless sponge, which involves heating your sugar in the oven before mixing it into the other ingredients is absolutely fool proof, as is her method for making a cheese custard tart. Don’t bother with blind-baking the pastry case, smear the base with butter, tip in the egg /cheese mixture and bake. The pastry will not rise up in the way other cooks warn you will happen if you don’t blind-bake.
As said upthread, she was a fascinating creature, widowed at 18, married again but not married to Johnnie for years though pretending to be so. As well as the hard to find biography, ‘Fear of Fanny’ there is also her autobiography, ‘Something’s Burning’, even rarer.
She also wrote some children’s books as Frances Dale. I still have ‘The Gooseyplums of Duckpond-in-the-Dip’.