This milkshake recipe is mostly going to appeal to adults. From the blog 10th Kitchen, the shake features fernet and fig flavors -- flavors kids aren't typically into. Although there is still chocolate.
Fernet-Branca is described as "herbal, strong, bitter" and is supposed to pair quite nicely with chocolate. Fig is earthy while also adding some seasonal spice. It's another ingredient that has been popping up in a wide variety of ice cream-based desserts. Orange marmalade would also make a great substitute if you don't have any (or aren't a fan of) fig jam. You will also need ingredients including good quality chocolate ice cream, milk, the fernet branca and fun garnish. You can never go wrong with whipped cream and a drizzle of chocolate sauce.