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Lacto-Fermented Blueberries with Mint

A small glass bowl filled with glossy, dark fermented blueberries with fresh mint leaves on top.
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Make probiotic, preserved blueberries infused with fresh mint using a simple lacto-fermentation process. This recipe yields a healthy preserved snack perfect for adding bright flavor to your meals.

Ingredients

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  • 2 cups fresh blueberries
  • 1/4 cup fresh mint leaves, lightly packed
  • 1.5 cups filtered water
  • 1 teaspoon non-iodized sea salt
  • 1 teaspoon whey or a pinch of starter culture (optional, for faster fermentation)

Instructions

  1. Clean your pint-sized glass jar and lid thoroughly.
  2. Gently rinse the blueberries and place them into the clean jar.
  3. Tear or lightly crush the mint leaves to release their oils and add them to the jar with the blueberries.
  4. In a separate bowl, dissolve the sea salt into the filtered water to create the brine. Stir until the salt is completely dissolved.
  5. If using whey or starter culture, add it to the brine now and stir briefly.
  6. Pour the brine over the blueberries and mint, ensuring the fruit is completely submerged beneath the liquid. Leave about 1 inch of headspace at the top of the jar.
  7. Place a fermentation weight on top of the berries if necessary to keep them under the brine.
  8. Seal the jar loosely with the lid to allow gases to escape, or use an airlock lid.
  9. Place the jar on a plate (to catch any overflow) and keep it at room temperature, out of direct sunlight, for 3 to 7 days.
  10. Check daily. You should see small bubbles forming, which indicates active fermentation. Taste after 3 days.
  11. Once the flavor is pleasantly tangy and slightly sour, remove the lid, skim off any white film (kahm yeast, which is harmless), and seal the jar tightly.
  12. Transfer the jar to the refrigerator to slow the fermentation process. Your probiotic blueberries with mint are ready to eat.

Notes

  • For a quicker, pickle-style result, you can use a 2% brine (about 1.5 teaspoons of salt per cup of water) and refrigerate after 24 hours at room temperature.
  • Use non-iodized salt; iodine can inhibit the growth of beneficial Lactobacillus bacteria.
  • If you do not have whey or starter culture, wild fermentation will still work, but it may take a few extra days to begin bubbling.
  • This preserved blueberries mint flavor pairs well with yogurt or cottage cheese.

Nutrition

Find it online: https://cookingzenith.com/fermented-blueberries-with-mint-recipe/