Kopi Joss
Also kopi jos, charcoal coffee
Yogyakarta's charcoal coffee: a glowing coal dropped into sweet black coffee for a hiss and a smoky, less acidic cup.
RegionalServed hotFrom Indonesia
- Volume
- 200ml6.8 US fl oz
- Espresso
- 0shots
- Caffeine
- 80mgderived, USDA FDC
- Glass
- Serving glass250 ml
The build
Watch it made, step by step- Kopi tubruk with sugar200 ml100%
- a piece of red-hot…0 ml0%
- Volume
- 200ml
- Caffeine
- 80mg
- Espresso
- 0shots
Scales every component together, so the ratio holds; caffeine scales with the coffee.
A sweet kopi tubruk into which a glowing lump of charcoal is dropped, hissing ('joss'), then removed.
Caffeine
Derivedin a 200 ml kopi joss
USDA FoodData Central SR Legacy caffeine per 100 g scaled to the coffee volume in components, assuming 1 g per ml. FDC 171890 (Beverages, coffee, brewed, prepared with tap water) 40.0 mg/100 g x 200 ml.
USDA FoodData Central record 171890 · read 2026-10-26
A derived figure: the reference food's caffeine per 100 g scaled to the coffee in this build. Real cups vary with the coffee, the dose and the shot.
Variants by country
No regional variants recorded.
History
Popular accountWikidata records Indonesia as country of origin and charcoal as a part. The street-stall origin on Jalan Wongsodirjan in the 1960s is a popular account.
Yogyakarta, Indonesia.
Parts of this story are repeated widely but were not confirmed against a source this atlas accepts. They are kept as the story people tell, not as fact.
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