Add ice, toffee gin, chocolate liqueur and Amaretto to a cocktail shaker and shake vigorously.
Pour the chocolate syrup into a saucer and dip the top of a martini glass into the sauce.
Grate some of the Willie\'s sea salt chocolate into another saucer and dip the coated glass, so the flakes stick to the sauce, creating a chocolate rim! Pour the contents of the shaker into your chocolatey glass and sprinkle with more grated chocolate - enjoy!
Serve: Cocktail glass