1) 4 oz. chocolate milk - I used Silk brand chocolate almond milk. It has a very rich chocolate flavor without being too sweet. If you want to make something similar with regular milk, use whole milk and a quality cocoa mix like Ghirardelli Double Chocolate.
2) 2 oz. Kraken Spiced Rum - tastes great, not expensive. No actual giant squid were harmed.
3) 2 oz. Black Blood of the Earth coffee extract - OK, here's where you definitely want to think about substituting. While BBotE is wonderful stuff, it's really pricey and not easy to get. If you can get unsweetened coffee extract (hard to find outside of Rhode Island), go with that. Otherwise, make it yourself - America's Test Kitchen has a write-up of a process most people can do at home without much extra investment. The extract will keep in the refrigerator for about a week, and is less acidic than hot brew coffee.
4) 0.5 oz of sugar cane syrup - I use Petit Canne syrup, mostly because it's what my local liquor store carries. Cane syrup has a flavor profile about half-way between plain simple syrup and caramel, and the strong flavors of the other ingredients requires something with a bit more authority.
At this point, you can just mix all the ingredients in a glass and add ice, or blend in a cocktail shaker with ice. The shaker will give you a nice froth on top of the drink. If you are using Black Blood of the Earth, be careful. Two ounces was enough to keep me up until 2 am, after drinking this at 8:30 pm.
