Indonesia's "charcoal coffee" has become a tourist highlight.

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When it comes to charcoal coffee, coffee drinkers must be familiar with it. If you're traveling to Yogyakarta, Indonesia, try the "charcoal coffee," because the store owners actually throw a hot piece of charcoal into the coffee. According to oddity central, the coffee is said to have been invented in the 1960s by local cafe owner "mr. man" to tone his stomach. Alex, now the cafe's owner, said Mr. Mann was brewing coffee as usual, staring at the burning coal and inspired to take a hot charcoal and put it in his coffee. Slowly, the coffee became known locally.

Today, tasting a cup of charcoal coffee is one of the tourist highlights of Yogyakarta. Its production process is actually not complicated, is to grind ordinary coffee, add 4 tablespoons of sugar and boiling water, and then put a piece of red-hot charcoal into the coffee cup, wait until the charcoal cools and then take it out, you can enjoy coffee. Local students analyzed charcoal coffee and found that charcoal absorbed part of the caffeine and neutralized some of the sourness. The red-hot charcoal also burned part of the sugar in the coffee, making charcoal coffee unique. A cup of charcoal coffee costs 4000 rupees (about 2.07 yuan).