Hi. My dad has developed dementia, and he used to make me this incredibly delicious flourless chocolate espresso cake, with confectioner's sugar and toasted hazelnuts on top. The recipe was contained in a book that had a purple cover. I remember it being a square-shaped book, with perhaps a mokka pot on the cover. It was published in the early 1990s. I once found it on Amazon, but lost it in a hurricane. I don't remember the name of the book nor the name of the recipe; I've been searching for hours online. I need help. It's my father's birthday today, and I would like to make him this cake in his honor. I appreciate any ideas or leads. Thank you so much.