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Finnish Cucumbers for Winter (+Cooking Video)
Finnish cucumbers for winter are pickled cucumbers with a distinctive feature — extra-crispy firm flesh ensured by an unusual ingredient: mustard seeds. The Finnish-Scandinavian preserve tradition has used mustard seeds in pickling for centuries; the seeds release compounds that maintain cell-wall structure during the boil, producing dramatically crunchier results than mustard-free recipes. Bonus: even oversized "imperfect" cucumbers work beautifully with this method since they're cut into chunks rather than preserved whole.
The recipe yields 4 half-liter jars at 25 kcal per 100 g. Time about 2.5 hours.
Ingredients
Show ingredients
- cucumbers – 1.5 kg,
- purified water – 1 l;
- mustard seeds – 2 tsp;
- bay leaf – 2 pcs;
- white sugar – 100 g;
- rock salt – 50 g;
- vinegar 9% – 100 ml.
Preparation
- I prepare the ingredients. Optional: add a small piece of horseradish root for sharper tang. Each batch of cucumbers should be uniform in size and ripeness. Salt must be rock salt (not iodised). Jars and lids sterilise in advance.
- Cucumbers soak in cold water 2 hours, then wash thoroughly.
- Cut off cucumber tails, slice into 2-3 cm "barrel" pieces.
- In a pot, water combines with all brine ingredients (salt, sugar, bay leaf, mustard seeds). Stir and bring to heat.
- When mixture boils, vinegar joins. Bring back to boil.
- Cucumbers add to the boiling brine — heat stays on.
- Boil cucumber pieces until they change colour from bright green to olive-green — about 4-5 minutes.
- Distribute cucumbers into jars, pour brine over to fill to the top.
- Lids screw on tight, jars invert and wrap in blanket. Slow-cool in the thermal bath until completely room temperature. Finnish cucumbers for winter are ready.
Sealed cucumbers store at room temperature in a dark place. The crispy tangy pieces enhance any dish — perfect with grilled meat, on rye bread sandwiches, in salads, or as standalone zakuska.
Cooking video
Tips and Tricks
Tip 1. THE MUSTARD SEEDS ARE THE CRISPY SECRET. Mustard seeds contain isothiocyanate compounds that strengthen pectin chains in cucumber cell walls, dramatically improving crunch retention through preservation. Without mustard seeds, the cucumbers turn soft within months. The 2 tsp ratio for 1 L brine is calibrated; doubling produces noticeably mustard-flavoured cucumbers (some prefer this), but standard ratio gives the best balance of crispness AND traditional cucumber flavour.
Tip 2. THE COLOUR-CHANGE TIMING IS THE DONENESS CUE. Step 7's "olive-green" colour change is the precise doneness indicator — bright green = under-cooked (won't preserve well, may spoil); deep olive-green = perfect (fully cooked, preserves beautifully); dark brown-green = over-cooked (mushy result). The 4-5 minute timing usually nails it; watch the colour rather than the clock for foolproof results. For another zucchini-chili-ketchup winter preserve worth comparing, see Zucchini with Chili-Ketchup for Winter.
Tip 3. THE BARREL-CUT WORKS FOR ANY CUCUMBER SIZE. Step 3's 2-3 cm "barrel" pieces is the recipe's flexibility feature — even oversized end-of-season cucumbers work because you cut them to a uniform size. Small pickling cucumbers cut into 2-3 sections; medium cucumbers into 4-5; oversized into 6+ pieces. The barrel-cut also means more surface area for brine penetration, giving more uniform flavour absorption than whole-cucumber preserves.
Tip 4. THE SCANDINAVIAN-STYLE FLAVOUR. Finnish-style pickling has a distinctive sweet-sour balance with the mustard backbone — different from Russian-style (more salty, more dill-heavy) or Mediterranean-style (more vinegar-forward). The 100 g sugar to 50 g salt ratio gives the characteristic sweet edge. Don't reduce sugar significantly; the recipe's identity depends on this balance. Don't add dill or other Russian herbs — they'd overpower the mustard character. For another beet-based winter preserve worth trying, try Borscht Base for Winter with Beets.
Frequently Asked Questions
Why "Finnish-style"?
Finnish (and Scandinavian generally) pickling tradition has used mustard seeds and sweet-sour brines for centuries — distinct from Eastern European Russian-style salting traditions. The "Finnish-style" name became common in Russian-Soviet recipe books to identify this specific approach with mustard seeds and 2:1 sugar:salt ratio. Authentic Finnish pickled cucumbers may use slightly different proportions (more sugar, often with allspice instead of bay), but the core mustard-seeds-for-crispness technique is identifiably Finnish/Scandinavian. The name distinguishes from Russian "kvashenye" (fermented) and "marinovannye" (vinegar-only) traditions.
How long do the jars keep?
Properly sealed jars at room temperature in a dark place keep 12+ months — until next cucumber season. Cool basement extends to 18 months. Once opened, transfer to fridge and use within 2-3 weeks. The cucumber crispness stays good for 8+ months thanks to the mustard seeds' preservation of pectin structure. The flavour deepens over months. If you spot mould, fizzing, or bulging lids, discard the jar.
Can I use other mustard products instead of seeds?
Whole mustard seeds are the right product — they release compounds slowly during boiling and storage. Substitutes don't work as well: dried mustard powder dissolves immediately and gives a strong mustardy flavour without the slow-release crispness benefit; prepared mustard contains vinegar and other ingredients that throw off the brine balance. Whole yellow mustard seeds are most common and give mild flavour; brown mustard seeds give sharper character; black mustard seeds are most pungent. Yellow is the standard Finnish-recipe choice.
Can I omit the horseradish?
Yes — horseradish is mentioned as optional in step 1. Without horseradish, the cucumbers are slightly less sharp but still excellent — the mustard seeds provide most of the character. With horseradish (a small piece, 2-3 cm), the cucumbers gain a distinctly sharp tang that some prefer. Substitutes for horseradish: 1 small dried chili (different but interesting heat), 2-3 garlic cloves (sharper allium accent), or 1 tsp coriander seeds (different but Caucasian-leaning aromatic). All variations are acceptable; the base recipe is excellent on its own.
