Even non-coffeeheads recognize names like Jamaican Blue Mountain as expensive, high-quality coffee, but few outside the coffee industry know that the little island of Puerto Rico also has its own rich coffee tradition. Best known for its production of sugar cane and rum, Puerto Rico also exports coffee beans, though it can be surprisingly difficult to find in the United States. This wasn’t the case in the past. In fact, Puerto Rico has a well-developed coffee tradition that began in the early 1800s when a group of immigrants from Corsica arrived on the island, fleeing events in Europe.

The immigrants were …