This sweet cucumber salad pairs cool, crisp slices with a lightly tangy rice-vinegar dressing, a little sesame oil, and just enough sugar to round out the flavor. Salting the cucumbers briefly first helps keep the dressing lively instead of watery, making this an easy, refreshing side for weeknight dinners and summer meals.
Ingredients
- 2 large English cucumbers, about 1½ pounds total
- 1 teaspoon kosher salt (or ¾ teaspoon fine salt)
- ⅓ cup unseasoned rice vinegar
- 3 tablespoons granulated sugar
- 1 tablespoon water
- ½ teaspoon toasted sesame oil
- ¼ small red onion, very thinly sliced
- 2 tablespoons thinly sliced scallions
- 1 tablespoon toasted sesame seeds
- ¼ teaspoon red pepper flakes, optional
English cucumbers are a good choice because their skin is tender and they have relatively few seeds. If using standard garden cucumbers, peel them if the skin is tough and scoop out large, watery seeds before slicing. Use unseasoned rice vinegar so you can control the sweetness and saltiness yourself; seasoned rice vinegar already contains both.
Instructions
- Slice the cucumbers. Rinse and dry the cucumbers, then trim off the ends. Slice them into even rounds about ⅛ inch thick. A sharp knife works well; a mandoline makes especially uniform slices, but use its hand guard and keep your fingers clear. Put the cucumber slices in a colander set over a bowl or in the sink.
- Salt and drain. Sprinkle the cucumbers with the kosher salt and toss thoroughly so the slices are lightly coated. Leave them to drain for 20 minutes. The salt draws out some excess moisture, which helps the finished salad stay crisp and keeps the dressing from becoming diluted. You should see droplets collecting beneath the colander.
- Make the dressing. While the cucumbers drain, combine the rice vinegar, sugar, and water in a small bowl. Stir for about a minute, until the sugar is mostly dissolved. Stir in the sesame oil. Taste a small drop: it should be clearly sweet and pleasantly sharp, not syrupy. If your vinegar is especially assertive, add another teaspoon of water; if you prefer a sweeter salad, add sugar a teaspoon at a time.
- Dry the cucumber slices. Shake the colander gently to remove loose water, then spread the slices on a clean kitchen towel or a few layers of paper towel. Pat them dry without crushing them. There is no need to rinse away the salt when you use the amount listed; rinsing can remove too much seasoning and put water back on the cucumbers.
- Dress the salad. Transfer the cucumbers to a medium serving bowl. Add the thinly sliced red onion and pour over the dressing. Toss gently until the slices are coated. Leave the bowl in the refrigerator for 15 minutes so the vinegar and sugar can season the cucumbers, tossing once halfway through if convenient.
- Finish and serve. Sprinkle with scallions and sesame seeds, then add red pepper flakes if you want a little heat. Toss once more and taste a cucumber slice. Serve chilled or cool, with a spoon to catch the dressing at the bottom of the bowl.
Tips
- Keep slices even. Slices close to ⅛ inch thick become seasoned quickly but still have a pleasant bite. Very thin slices soften faster, while thick slices need more time in the dressing. If you are slicing by hand, aim for consistency rather than perfection.
- Give the cucumbers time to drain. The 20-minute salting step makes a noticeable difference, especially if the cucumbers are very fresh or have large seeds. If you are short on time, drain them for at least 10 minutes and pat them very dry; expect the salad to release a little more liquid as it sits.
- Adjust sweetness with care. Start with the recipe’s 3 tablespoons of sugar, then taste the dressing before adding it to the cucumbers. Vinegars vary in sharpness, and personal preferences vary too. Add extra sugar in small increments rather than pouring in more at once. You can use honey or maple syrup instead, but the dressing may have a more pronounced flavor and may take longer to dissolve.
- Dress close to serving time. The cucumbers stay crisper if they are salted and drained ahead, then mixed with dressing shortly before eating. If you want to prepare everything early, keep the dressing and drained cucumber slices separate in the refrigerator and combine them about 15 to 30 minutes before serving.
Serving Suggestions
Serve this salad as a cool counterpoint to rich, savory, or spicy food. It is especially good alongside grilled chicken, pork chops, salmon, tofu, or a bowl of steamed rice. The sweet-sour dressing also works well with noodle dishes and meals featuring ginger, garlic, or chili because it refreshes the palate between bites. For a simple lunch, pair a generous portion with a rice bowl, a fried egg, and leftover vegetables.
For a casual meal, serve the salad in a shallow bowl rather than a tall one. The cucumber slices are easier to pick up, and the sesame seeds and scallions stay visible instead of gathering at the bottom. This recipe makes about four side-dish servings. If serving a larger group, it is easy to double, but use a wide bowl so you can toss the cucumber evenly without bruising it. Offer the salad cool, not icy cold; a few minutes out of the refrigerator lets the vinegar and sesame aroma come through.
Variations
Make it more savory: Add 1 teaspoon soy sauce to the dressing and reduce the salt used on the cucumbers to ¾ teaspoon kosher salt. Since soy sauce varies in saltiness, taste the finished dressing before adding anything else. A small amount of grated fresh ginger also gives the salad a sharper, aromatic note.
Add fresh herbs: Replace the sesame oil and seeds with 2 tablespoons chopped dill or mint for a more familiar garden-style cucumber salad. You can still use rice vinegar, or substitute white wine vinegar for a slightly different tang. Add herbs just before serving so their color and fragrance stay fresh.
Make it spicy: Keep the red pepper flakes, or replace them with a thinly sliced fresh chile. Start with a small amount, taste, and add more if you like. For a gentle heat with a little extra savoriness, use a small spoonful of chili crisp as a garnish, bearing in mind that it adds oil and salt.
Add crunch or extra vegetables: Toss in a small, thinly sliced sweet pepper or a handful of matchstick-cut carrot. You can also add ½ teaspoon of finely grated lime zest for a brighter aroma. Add-ins should be modest so the cucumber remains the main ingredient and the dressing still coats everything.
Storage and Reheating
This salad is best on the day it is made, when the cucumber is crisp and the dressing is bright. Once dressed, cover and refrigerate leftovers promptly. They will keep for about 1 day, although the cucumbers will soften and release more liquid over time. Before serving leftovers, stir gently and taste; the extra liquid can make the flavor seem milder, so a small splash of rice vinegar may help restore its tang. Avoid leaving the salad at room temperature for more than 2 hours, or 1 hour on a very hot day.
For make-ahead preparation, the cucumber slices can be salted, drained, and patted dry up to 1 day ahead. Store them in a covered container lined with a dry paper towel, and keep the dressing in a separate sealed jar in the refrigerator. Slice the onion and scallions shortly before serving for the freshest flavor. Combine the cucumber and dressing 15 to 30 minutes before the meal. Do not freeze the salad: freezing damages the cucumber’s structure, and thawed slices become soft and watery.
There is no reheating step for this dish. It is meant to be served chilled or cool, and warming it would make the cucumber limp. If it has been refrigerated, take it out for about 5 to 10 minutes before serving if you prefer a less-cold salad, then toss and garnish it. Keep the bowl chilled if it will sit out during a long meal.
Frequently Asked Questions
Can I use regular cucumbers instead of English cucumbers?
Yes. Choose firm cucumbers with smooth skin if possible. If their skin is thick or waxy, peel them in alternating strips or peel them completely. Cut one open and check the seed center; if the seeds are large and watery, scoop them out with a spoon before slicing. The final amount may be a little different, but the dressing will work with roughly 1½ pounds of prepared cucumber.
Why is my cucumber salad watery?
Cucumbers naturally contain a lot of water, and they continue to release it after they are dressed. Salting the slices for 20 minutes, draining them, and patting them dry reduces that effect. Watery results can also come from skipping the draining step, using very thin slices, or preparing the salad many hours in advance. If liquid collects, drain a little from the bowl and taste the salad before adjusting the dressing.
Can I make this salad without sesame oil?
Yes. Leave it out for a lighter, clean vinegar flavor, or use a small amount of neutral oil if you want a softer dressing. Olive oil will work, but it has a stronger taste and makes the salad less sesame-forward. If sesame is an allergy concern, also omit the sesame seeds and check that any substitute ingredients are safe for the person eating it.
Can I use a sugar substitute?
You can, but the result depends on the sweetener. A liquid sweetener such as honey or maple syrup can be stirred into the vinegar, though it changes the flavor slightly. Granulated alternatives may dissolve unevenly in a cold dressing, so follow the product’s conversion guidance and dissolve it thoroughly. Start with less than the equivalent amount, taste, and adjust gradually.
How far ahead can I make sweet cucumber salad?
For the crispest texture, prepare the cucumber and dressing separately up to 24 hours ahead and combine them 15 to 30 minutes before serving. If you need to mix the whole salad in advance, a few hours in the refrigerator is usually fine, but the slices will gradually soften. Add the sesame seeds and scallions at the end so they retain their texture and color.
What should I do if the dressing tastes too sour or too sweet?
If it tastes too sour, stir in sugar a teaspoon at a time, allowing each addition to dissolve before tasting again. If it is too sweet, add rice vinegar a teaspoon at a time. A little water can soften either flavor without making the dressing more acidic or sugary. Make these adjustments before dressing the cucumbers, since the cucumber’s own moisture will dilute the flavor slightly as the salad rests.