Collectors hunt for the coffee cherries in the droppings of civets in Indonesian plantations to make a brew enriched by the bushy-tailed, cat-like animal's stomach that sells for as much as $770 a kg in London.
But as demand rises, producers have spotted an opportunity to increase supply by breeding the civets in cages and feeding them the coffee cherries. Production has started on a small scale.
Experts say the flavor relies on the civet's finicky feeding habits and varied diet to create the enzymes that enrich fermentation of the beans, so caged animals would produce a different coffee.
"I think wild civets offer more variants to the taste," said specialty coffee expert Edi Sumadi. "Inside the cage, the civets' diet is regulated, they're not free to pick following their instincts, so the enzyme inside their digestive system is monotonous."
Perkebunan Nusantara XII sells the civet coffee for $130 a kg from factories or $250 a kg in cafes on Indonesia's main island of Java, though the price multiplies as exports reach countries such as Korea, Japan, Italy and the United States.
"It's far tastier than any other coffee," said the firm's Danu Rianto. "To maintain high standards we have a standard operating procedure."
The coffee does not appeal to everyone -- Indonesia's President Susilo Bambang Yudhoyono took some as a gift on a visit to former Australian Prime Minister Kevin Rudd, only to find local media dubb it "crappucino".
But now that Indonesia's highest Islamic authority has certified the brew as no longer "haram", or banned for Muslims, in the world's most populous Muslim nation -- so long as the beans are well washed -- producers, including Perkebunan Nusantara XII, are eyeing a bigger market.
In Jakarta's cafes, a cup of civet coffee, known as "kopi luwak", sells for around $9 to $11, and is attracting more interest.
"The taste is very smooth, the smell nice, and hey, it's not entirely haram after you wash it," said Andrea Guna, a first-time taster.
"The price is double that of Starbucks, but the taste is way more than double."