Noma-Style Lacto-Fermented Cucumbers & Radishes (2% Brine)

Crunchy, tangy cucumbers and radishes fermented in a Noma-style 2% salt brine for clean lactic acidity. This method uses precise weights, an anaerobic setup, and temperature control to favor Lactobacillus over spoilage microbes. Expect a bright, lightly funky pickle with snappy texture—great on rice bowls, sandwiches, or chopped into salads. Works in a jar with an airlock, or a vacuum bag for maximum reliability and minimal surface yeast.

Total time: 7220 minutes

Yield: Makes about 1 L / 1 qt pickles

Ingredients

  • 500 g cucumbers (Kirby/Persian), scrubbed; ends trimmed
  • 250 g radishes, scrubbed; tops trimmed (reserve greens for sautéing)
  • 15 g fresh garlic (about 3 cloves), lightly smashed
  • 5 g fresh ginger, sliced (optional)
  • 2 g dill seed or 10 g fresh dill (optional)
  • 1–2 g black peppercorns (optional)
  • 750 g cold, non-chlorinated water (filtered or rested overnight)
  • 15 g fine non-iodized salt (2% of 750 g water)
  • 2 g calcium chloride (0.25% of water weight) (optional, for extra crunch)
  • OR 3–5 g dried grape leaves/black tea (tannins) (optional)
  • 1 qt / 1 L jar with airlock or loose lid + small jar weight (or a vacuum bag + sealer)

Instructions

  1. Wash cucumbers (500 g) and radishes (250 g) well. Trim cucumber blossom ends (the last ~2–3 mm) to reduce softening enzymes. Slice cucumbers into spears or thick coins; slice radishes into halves/quarters.
  2. Lightly smash garlic (15 g) and (optional) slice ginger (5 g). Set aside.
  3. In a measuring jug or bowl, dissolve salt (15 g) into cold non-chlorinated water (750 g). Stir until clear.
  4. If using calcium chloride for crunch, dissolve 2 g into the brine now (it should fully dissolve).
  5. Pack cucumbers (500 g) and radishes (250 g) tightly into a clean 1 L jar. Tuck in garlic (15 g) and any optional spices (ginger 5 g, dill, peppercorns).
  6. Pour in the brine (750 g water + 15 g salt) to fully submerge everything. Leave 2–3 cm headspace for expansion.
  7. Weight the vegetables so nothing floats above the brine. Fit an airlock lid, or use a loose lid you “burp” daily (open briefly to release gas).
  8. Ferment at 20–24°C (68–75°F), out of direct sunlight. You should see small bubbles within 24–48 hours and smell a clean, yogurty-sour aroma (not rotten).
  9. Start tasting at day 3. They’re “ready” when the cucumbers are still crisp but clearly tangy; radishes will turn slightly translucent and pleasantly sharp.
  10. For best practice, measure pH with strips or a meter: aim for pH ≤ 4.0 for a reliably sour, stable ferment. If you’re above that, keep fermenting and re-check daily.
  11. Once you like the flavor, move the jar/bag to the fridge. Cold slows fermentation dramatically and preserves crunch.

Notes

Food safety: Use clean equipment and non-chlorinated water. Keep vegetables fully submerged to prevent mold. Temperature matters: warmer than ~26°C can soften cucumbers and push funky notes; cooler slows fermentation. Crunch control: trimming blossom ends helps; calcium chloride (0.25%) gives the most reliable snap without adding tannin flavors. If your kitchen is warm, ferment 2–4 days then refrigerate. If your brine tastes too salty, you can briefly rinse the pickles before serving (don’t dilute the ferment during fermentation).