Kvas: The Russian Fermented Drink You Didn’t Know You Needed to Try

If you travel to Russia in the summer, there’s one word you’ll hear everywhere: kvas. And no, it’s not just any soft drink or disguised beer. It’s an ancient beverage, slightly fermented, deeply Slavic, and surprisingly refreshing. What does it taste like? What is it made of? And why is it sold in street barrels?

What is kvas?

The kvas (квас) is a traditional Slavic drink made from fermented rye bread. Its flavor is hard to describe: something between a very mild non-alcoholic beer and a soda with acidic and sweet hints. It’s as old as Kievan Rus itself and remains part of many Russians’ daily lives.

Interestingly, although it does contain some alcohol (around 0.5% or less), in Russia, it’s considered non-alcoholic, so both adults and children drink it.

Kvas always brings back childhood memories for me: those hot summers when we’d go down with a few kopecks in our pockets and line up in front of the barrel, waiting for our cold glass. Its taste was unmistakable, and each sip made us feel a little more grown-up.

Ingredients and Preparation

Traditionally, kvas is made with:

• Dry or toasted black (rye) bread
• Water
• Sugar or honey
• Yeast
• Sometimes dried fruits, mint, or even beets are added

After hours or days of fermentation, the liquid is strained and cooled. The result: a cloudy, dark, frothy, and very tasty beverage.

Where is it consumed?

In the summer, kvas is ubiquitous in Russia, Ukraine, or Belarus. You can find it:

• In supermarkets, bottled as if it were a Coca-Cola
• In street stalls, where it’s served directly from yellow barrels or mobile tanks
• In rural markets, sold by grandmothers who make it at home
• In restaurants, as a traditional accompaniment

In cities like Moscow or St. Petersburg, it’s not uncommon to see tanker trucks with taps dispensing kvas into plastic cups for a few rubles. Quite an experience.

What does kvas taste like?

If you enjoy fermented flavors, you’ll love kvas. It’s:

• Slightly sweet but not cloying
• With a touch of acidity or vinegariness
• Refreshing, with natural fizz (from fermentation)
• A bit like wet bread… in the best possible way

And yes, its flavor might be surprising at first, but many end up hooked.

Benefits and Curiosities

• Kvas is considered healthy: it aids digestion, contains probiotics, and minerals.
• It was used in the former USSR as an energy drink for workers and soldiers.
• In some regions, it’s also used as a base for cold soups like okroshka.
• There are artisanal brands, but also industrial ones like Nikola, Ochakovo, or Dary Kumy.

Is it worth trying?

Definitely yes. Not just for its taste, but because kvas is part of the Russian gastronomic soul. It’s like drinking a piece of history. And if it doesn’t win you over at first, give it a second chance: each brand and homemade version tastes different.