This is a lightly sweet cocktail. If you prefer a sweeter version, add one to two tablespoons of simple syrup and stir in.
The Dark and Stormy cocktail is technically not a mule cocktail and is traditionally served in a highball glass instead of a copper mug. Feel free to use what you prefer.
Floating the rum on the top of the drink is visually pleasing, but if you prefer a less rum-forward first sip, we suggest giving it a stir before serving.