Homemade Rye-Bread Yeast Kvass

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Rye bread gives this kvass its toasted flavor, while a short yeast ferment adds a gentle tang. The source uses 500 grams of bread, three litres of water, sugar and just five grams of dry yeast. Toast the bread so it colors without burning, then steep it in water that has cooled enough for the yeast. Keep the vessel covered with breathable cloth and taste during the first day, since a warm kitchen speeds fermentation. Strain before bottling. The optional raisins can produce pressure, so use food-safe bottles with headspace, chill promptly and open carefully. This homemade drink may contain alcohol and needs cold storage.

Recipe card

Homemade Rye-Bread Yeast Kvass

A short-fermented rye-bread kvass made with toasted bread, sugar, dry yeast and optional chicory.

Prep 25 minCook 15 minTotal 1480 minYield About 3 litres before straining

Equipment: Baking tray, food-grade vessel, sieve, pressure-rated bottles

Ingredients

500 g rye or dark bread, cubed 3 L potable water 200 g sugar 5 g dry yeast 2 tsp chicory, optional 10–15 raisins, optional for bottling

Instructions

1. Toast bread

   Dry the bread cubes at 180°C for 10–15 minutes until browned but not burnt.

2. Steep

   Pour previously boiled water cooled to 30–35°C over the toasted bread in a clean food-grade vessel.

3. Add yeast

   Bloom yeast with 1 tsp of the measured sugar in a little warm liquid for 10 minutes; add yeast, remaining sugar and optional chicory.

4. Ferment

   Cover with breathable clean cloth and leave 12–24 hours; taste for a mild tang and strain through a clean sieve.

5. Bottle cold

   Pour into clean pressure-rated bottles, add optional raisins, leave headspace, refrigerate immediately and open over a sink with care.

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How to tell when it is ready

Kvass tastes lightly tangy and smells pleasantly bready, without mold or a foul odor.

Tips

• Toast bread to deep gold, never black.
• Cool steeping water before adding yeast.
• Taste during the first day rather than fermenting by a fixed clock alone.
• Leave bottle headspace and open chilled bottles carefully.

Serving suggestions

• Serve well chilled on its own.
• Pour a little over ice on a hot day.
• Use chilled kvass as the base for okroshka.
• Offer with a hearty rye-bread lunch.

Make ahead

Measure ingredients ahead; mix and cook or bake according to the method on serving day.

Storage

Keep refrigerated and use within 3 days; pressure can continue to build.

Food safety

Fermentation can produce alcohol and pressurized bottles. Use food-grade equipment, refrigerate after straining and discard moldy or foul-smelling batches.

Frequently asked questions

Is homemade kvass alcohol-free?

No guarantee: yeast fermentation can create some alcohol, even in a short batch.

How should I store homemade rye-bread yeast kvass?

Keep refrigerated and use within 3 days; pressure can continue to build.