Beverages

How to make Beet Kvass

An earthy, salty, lightly sour beet tonic made by fermenting chopped beetroot in a light brine. Expect about 20 minutes of active prep, then 1-2 weeks of fermentation, with a taste check to decide when the liquid is tart enough to refrigerate.

Quick answer

Chop the beetroot, mix the brine, and pack everything into a clean jar with the beets fully submerged. After 3 days, make sure the beets stay submerged and look for the first signs of fermentation. After 7 days, taste the brine and decide whether to refrigerate it now or let it keep fermenting. After 14 days, do a final taste check, then strain the kvass and refrigerate it.

Difficulty
Beginner
Total time
14 days
Ingredients
5
Steps
4

Safety

  • • Keep the beets fully submerged below the brine throughout fermentation.
  • • Use non-iodized salt and non-chlorinated water for a more reliable ferment.
  • • Chop the beets rather than grating them so the brine does not turn alcoholic or slimy.
  • • A clean earthy smell is normal. A rotten smell, ropy brine, or fuzzy mold means the batch should be discarded.

Step-by-step

Day 0

Step 1: Prepare and pack

Chop the beetroot, mix the brine, and pack everything into a clean jar with the beets fully submerged.

  • Set up clean equipment Wash the jar, weight, bowl, and any utensils before you start.
  • Prepare beets Scrub the beetroot and chop it into roughly 2 cm cubes rather than grating it.
  • Mix brine Dissolve the salt fully in the water before pouring it over the beets.
  • Pack jar Pack the beets with any optional aromatics, pour in the brine, and keep everything below the surface.
Day 3

Step 2: Check fermentation

Make sure the beets stay submerged and look for the first signs of fermentation.

  • Check submersion Press any floating beets back below the brine if anything has shifted upward.
  • Check activity Look for a few bubbles, a deepening red colour, and a fresh earthy smell.
  • Check aroma The jar should smell fresh and earthy rather than rotten or yeasty.
Day 7

Step 3: Taste and decide

Taste the brine and decide whether to refrigerate it now or let it keep fermenting.

  • Taste kvass Spoon out a little of the brine and judge the balance of salt, earthiness, and tang.
  • Resubmerge and cover Return the beets below the brine before putting the jar back in its fermentation spot.
Day 14

Step 4: Finish and store

Do a final taste check, then strain the kvass and refrigerate it.

  • Taste final batch Confirm the brine is as earthy and tangy as you want before ending room-temperature fermentation.
  • Strain and refrigerate Strain the kvass into a clean bottle or jar and refrigerate it to slow the fermentation.

What to look for

  • • Day 0: The beet cubes are fully covered by brine and held down with a weight. That gives the batch the best chance to ferment cleanly and stay mold-free.
  • • Day 3-4: The brine turns deep ruby red and you may see a few small bubbles. Those are normal early signs that fermentation has started.
  • • Day 7 and beyond: The liquid tastes earthy and savoury with a light, fresh sourness. Use taste to decide whether to refrigerate now or ferment a few more days for more tang.

Troubleshooting

  • The brine turns thick, ropy, or slimy. The beets were grated, the room was too warm, or there was too much sugar in the ferment. Discard this batch and start again with chopped beets in a cooler spot.
  • No bubbles or colour change after a few days. The room is cool or fermentation is starting slowly. Give it another day or two and rely on smell and taste as well as visible bubbles.
  • A thin white film forms on the surface. Kahm yeast, which is common on vegetable ferments and usually harmless. Skim it off, make sure the beets stay submerged, and keep going if the smell is still clean.
  • The kvass tastes too salty. The ferment is still young or the brine ran slightly strong. Let it ferment a little longer, then dilute each serving with water if needed.

Storage

Strain the kvass into a clean bottle once it tastes balanced to you, seal it, and refrigerate.

Shelf life: about 1 month refrigerated

Serving suggestions

  • • Drink it on its own as a small, salty-sour tonic.
  • • Use it as a tangy base for cold beet soups like borscht.
  • • Whisk a little into salad dressings or chilled vegetable soups.

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Frequently asked questions

What is Beet Kvass?

An earthy, salty, lightly sour beet tonic made by fermenting chopped beetroot in a light brine. Expect about 20 minutes of active prep, then 1-2 weeks of fermentation, with a taste check to decide when the liquid is tart enough to refrigerate.

How long does it take to make Beet Kvass?

Most batches of Beet Kvass are ready in about 14 days, though exact timing depends on temperature and how the ferment tastes along the way.

Is Beet Kvass hard to make?

Beet Kvass is a great beginner project — no special skills required, just clean equipment and a little patience.

What do you need to make Beet Kvass?

You'll need Beetroot, Filtered water, Sea salt, Garlic, Black peppercorns.

How do I know when Beet Kvass is ready?

Watch for these cues: Day 0: The beet cubes are fully covered by brine and held down with a weight.; Day 3-4: The brine turns deep ruby red and you may see a few small bubbles.; Day 7 and beyond: The liquid tastes earthy and savoury with a light, fresh sourness..

How do I store Beet Kvass?

Strain the kvass into a clean bottle once it tastes balanced to you, seal it, and refrigerate. Shelf life: about 1 month refrigerated.

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