Cucumber
Also called gherkin
Cucumber is crisp and hydrating, often eaten raw or pickled.
Cucumber is a juicy member of the gourd family, first grown in India and now eaten raw or pickled almost everywhere. It tastes mild, fresh and faintly sweet with a melon-like aroma and a cooling, crisp crunch.
Cooks love it for contrast. It cools down spicy dishes, freshens rich ones, and adds crunch to salads, sandwiches and dips like tzatziki and raita. Pickled, it becomes a tangy snack in its own right.
Flavor profile
Aroma: refreshing, mild
Good to know
Origin: India
Forms: fresh, pickled, sliced
Season: Cucumbers peak in summer, from roughly June to September, but greenhouse cucumbers are available year-round.
Nutrition: Mostly water, so it adds freshness and crunch more than nutrition.
Storage: Keep cucumbers in the fridge, ideally wrapped in a paper towel in a bag in the warmest part (often the door or top shelf), and use within a week. Very cold spots can make them watery and pitted. Store away from bananas, tomatoes and melons, which give off ethylene that speeds up softening. Slimy skin or a soft, mushy end means they are past it. Cucumbers do not freeze well whole, though slices frozen in a brine or blended into soups work.
How to use cucumber
Crisp Assurance
Ice water bolsters cell turgor, ensuring cucumbers stay crunchy.
Bitterness Reduction
Peeling removes cucurbitacin near the skin, cutting bitterness.
The science of cucumber
- Cucumber is about 95% water held under turgor pressure, which gives it that snap. Soaking slices in ice water firms them up, while salting pulls water out by osmosis for a more concentrated, less watery salad.
- Its fresh, green, melon-like aroma comes largely from aldehydes such as (E,Z)-2,6-nonadienal, which form when the cells are cut and enzymes get to work.
- Bitterness in some cucumbers comes from cucurbitacins, concentrated near the skin and stem end. Peeling and trimming the ends removes most of it.
- Pickles stay crunchy when the pectin in their cell walls holds firm. Trimming the blossom end (which carries softening enzymes), using fresh cucumbers and adding tannin-rich leaves like grape leaves all help.
How to choose cucumber
Choose firm, evenly green cucumbers with no soft spots, yellowing or wrinkles. Thinner varieties such as English and Persian cucumbers have tender skin and small seeds; standard slicing cucumbers often have waxed skin and bigger seeds. For pickling, pick small, bumpy pickling cucumbers.
Substitutes for cucumber
| Swap | Amount | What changes |
|---|---|---|
| Zucchini, raw | 1:1 | Shaved thin, it gives a similar mild crunch in salads, though less juicy. |
| Celery | 1:1 | Crunchy and fresh, with a stronger, more savoury flavour. |
| Jicama | 1:1 | Crisp, juicy and slightly sweet; holds its crunch well in salads and slaws. |
| Radish | use half as much | Crunchy but peppery; mix with another mild veg to keep things cool. |
What goes with cucumber
- Tomato. Cucumber's cool juice balances tomato's acid in fresh salads.
- Yogurt. Yogurt's tanginess contrasts cucumber’s fresh crunch.
- Feta. Feta gives cucumber a salty, briny contrast.
- Mint. Cucumber and mint share cooling notes perfect for crisp salads.
- Dill. Cucumber's mildness allows dill's anise-like notes to shine in salads.
- Rice Vinegar. Vinegar lightly pickles cucumber, preserving its crispness.
- Vinegar. Vinegar's acidity preserves cucumber's crunch and highlights its freshness.
- Radish. Cucumber's cooling effect tempers radish's spice.
- Lemon. Lemon's acid brightens cucumber's mild, watery flavor.
- Lime. Lime's sharp acid and cucumber's cool crunch pair in Southeast Asian and Mexican salads.
Mistakes to avoid
- Storing with ethylene quickens decay, softens the texture.
- Pickling acid can degrade pectin, losing crunch.
Ideas for tonight
- Thinly slice for salad.
- Layer into sandwiches for crispness.
- Pickle with vinegar and spices for tangy snacks.
Cucumber: questions
Do you need to peel cucumber?
Not usually. Thin-skinned English and Persian cucumbers are lovely unpeeled. Peel thick-skinned or waxed cucumbers, or any that taste bitter.
Should cucumbers be refrigerated?
Yes, but not in the coldest spot. Below about 10°C (50°F) they can get watery and pitted, so the fridge door or top shelf is a good home, and eat them within a week.
Why do cucumbers taste bitter?
Bitterness comes from cucurbitacins, which build up near the skin and stem, especially in stressed plants. Peeling and trimming the ends usually fixes it.
Can you freeze cucumber?
Not for salads, because thawed cucumber is limp and watery. You can freeze slices for smoothies, chilled soups or as quick freezer pickles.
How do you keep cucumber salad from getting watery?
Slice the cucumber, toss with salt and leave it in a colander for 15–30 minutes, then pat dry before dressing. The salad stays crisp and the dressing does not dilute.
What is the difference between a cucumber and a gherkin?
A gherkin is a small cucumber variety grown for pickling, with bumpy skin and a firm texture. In the UK, gherkin also means the pickled cucumber itself.
What does cucumber taste like?
Cucumber is crisp and hydrating, often eaten raw or pickled., with an aroma that is refreshing, mild.
What goes well with cucumber?
Cucumber pairs best with tomato, yogurt, feta, mint, dill. Cucumber's cool juice balances tomato's acid in fresh salads.
How do you use cucumber in cooking?
Crisp Assurance: ice water bolsters cell turgor, ensuring cucumbers stay crunchy.
How should you store cucumber?
Store cucumbers in the refrigerator, but avoid storing them with ethylene-producing fruits which can lead to wilting.
What is the most common mistake with cucumber?
Storing with ethylene quickens decay, softens the texture.
Yogurt
Tomato
Feta
Dill
Mint
Radish
Rice Vinegar
Zucchini
