Based on Batavia Arrack (a cane spirit also made with fermented Indonesian red rice), Swedish punsch is not only a cocktail ingredient in several classics and can be served on its own as well, but adding a splash of it to a cheap rum has a tendency to make said cheap rum taste like an expensive aged rum. Ah, cocktail alchemy!

Swedish Punsch
(or Swedish punch)

2 ounces Batavia arrack.
1/2 ounce rum.
3/4 ounce fresh lemon juice, strained.
1/2 ounce rich simple syrup.
2 ounces water.

If serving as a cocktail, combine with ice and add a pinch each of ground cardamom and nutmeg to taste. Shake for 10 seconds and strain into a cocktail glass; garnsh with a spiral lemon twist. If using as an ingredient in other drinks, increase the water to 3 ounces and combine all ingredients.