Fermented Ketchup Recipe

by Andreas

Cousine

Fusion

Course

Sauce

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Cook time

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Preparation time

10 minutes

Servings

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Summary

Fermented ketchup is a tangy, probiotic-rich condiment made by blending tomato paste with apple cider vinegar, spices, and a probiotic culture. After a brief fermentation, it’s ready to enhance any dish!

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Ingredients

  • 200-250 g tomato paste - 1 jar or tin
  • 1.5 tbsp unpasteurised apple cider vinegar
  • 1.5 –2 tbsp probiotic culture - e.g., whey, kefir, or probiotic powder
  • 40 g bottled or filtered water
  • 1 tbsp 20g sugar (optional: brown sugar, honey, or syrup)
  • 1 pinch of ground cinnamon - ~1/4 tsp
  • 1 pinch of ground clove - less than cinnamon, ~1/8 tsp**
  • 1 pinch of all-purpose pepper
  • 1/2 tsp salt - adjust to taste
  • 1 pinch of piri-piri or chilli powder - optional, adjust for spice level

Equipment

  • Medium mixing bowl
  • Measuring spoons
  • Mason jar - (with a loose-fitting or breathable lid for fermentation)
  • Silicone or wooden spoon - (for mixing)
  • Small whisk - (optional, for dissolving sugar)
  • Dark cloth or cover - (to keep jar in a dark place)

Instructions

  • Dissolve Sweetener:
    Mix sugar (or alternative sweetener) into the filtered water until dissolved.
  • Combine Ingredients:
    - Add the dissolved sweetener mixture to the tomato paste in a medium mixing bowl.
    - Add the apple cider vinegar, probiotic culture, salt, spices (cinnamon, clove, pepper), and chilli powder (if using).
    - Mix thoroughly with a spoon or whisk until smooth and evenly combined.
  • Jar and Ferment:
    - Transfer the mixture into a clean mason jar, leaving some space at the top to allow for fermentation activity.
    - Cover the jar loosely with a breathable lid or cloth.
    - Place in a dry, dark place at room temperature for 1–3 days. Check daily for signs of fermentation (bubbling or a tangy aroma).
  • Refrigerate:
    - Once fermentation is active, close the lid and move the jar to the refrigerator to halt fermentation.
    - The ketchup is ready to use and will continue developing flavour in the fridge.

Notes

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About the Author

Andreas

A passionate home cook who loves sharing cherished family recipes and experimenting with new flavours. With a deep appreciation for the joy that food brings to gatherings, Andrei aims to inspire others to create memorable meals in their own kitchens.

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