Granny's Special Sauce by Lolly Sparrow

Valencia Vialli, desperate to save her failing restaurant, digs through her Nonna’s handwritten recipes and discovers a legendary sauce said to have once kept the family business alive...
But the recipe is dark and its power hinges on a single, secret ingredient. As pressure mounts and her livelihood slips away, Valencia’s sense of right and wrong begins to erode.
Each compromise pulls her deeper into obsession, until her quest for culinary salvation becomes a descent into moral ruin, depravity and decay. What began as a search for flavour spirals into a tale of corruption, desperation, and the terrible lengths she’ll go to ensure her restaurant and her legacy survive.

Extreme horror, elements of feminine rage, a shit ton of ickiness!