Kopi Joss

Kopi Joss is the most theatrical coffee on this list, using a piece of burning charcoal dropped directly into the cup to caramelise sugar and slash acidity. This Yogyakarta street-side ritual reduces perceived sourness by about 60% compared to a standard brew, creating a smoky-sweet profile that outperforms #9 Papua Wamena’s tea-like softness for those who crave intensity. Each serving uses only 12 grams of fine-ground robusta beans, yet the charcoal reaction amplifies body to a syrupy density rarely seen in Indonesian coffees. At just 5,000 IDR per cup (roughly $0.32), it’s cheaper than the typical specialty pour-over by a factor of five, making it the most accessible entry in our ranking.