This is a 15-minute cucumber salad dressed with rice vinegar, sugar, and salt — no cooking required. It comes together faster than most side dishes and costs almost nothing to make. If you need something light and crisp to balance a heavier main, this is the one to reach for.
The short version of why this works
Two things make this salad work. First, salting the cucumbers before they hit the dressing would draw out excess water and keep them from diluting the vinegar — but since this recipe skips that step, slicing them as thin as possible (ideally 1/8 inch) is what compensates. Thin slices absorb the dressing quickly and stay crisp through the short 10-minute marinate. Second, the dressing ratio matters: the sugar isn’t there to make this sweet, it’s there to round out the sharpness of the rice vinegar. Get that balance right and the whole thing tastes clean rather than sour.
What can go wrong
- Watery dressing at the bottom of the bowl: Cucumbers release liquid as they sit. If you’re not serving immediately, plate with a slotted spoon and leave the pooled liquid behind — don’t pour it over the top.
- Slices that are too thick: Thick slices don’t absorb the dressing in 10 minutes. They’ll taste underdressed and stay bland in the center. If you don’t have a mandoline, use your sharpest knife and take your time.
- Over-marinating: Past 20–25 minutes, the cucumbers start to go limp. Make this close to when you plan to eat, not an hour ahead.
- Sesame seeds falling off: Add them right before serving, not while marinating. They lose their texture and aroma sitting in liquid.
- Dressing that won’t dissolve: Cold vinegar makes the sugar and salt harder to dissolve. Give the dressing an extra minute of whisking, or let it sit at room temperature for a few minutes before adding the cucumbers.
Substitutions that actually work
- Rice vinegar: Unseasoned is called for here. If you only have seasoned rice vinegar (the kind with salt and sugar already added), use it but cut the sugar to 1/2 teaspoon and skip the added salt, then taste before serving. Apple cider vinegar also works — it’s slightly more assertive but not wrong.
- Salmon roe: Skip the garnish — not worth the extra dish if you don’t already have it on hand. Thinly sliced scallions or a few drops of soy sauce stirred into the dressing give you the umami hit without a specialty ingredient.
- Sesame seeds: A small drizzle of toasted sesame oil (1/4 teaspoon) at the end covers the nutty note if seeds aren’t in your pantry.
- Cucumbers: English and Persian cucumbers are ideal, but a standard garden cucumber works fine — just peel it and scoop out the seeds with a spoon before slicing to reduce wateriness.
Storage and reheating
Store leftovers in an airtight container in the fridge for up to 24 hours. By the next day the cucumbers will be softer and the dressing more diluted — still edible, but not at their best. There’s no reheating involved; serve cold straight from the fridge. This dish doesn’t freeze — the cucumbers turn mushy and the texture is gone entirely. Make only what you’ll eat that day if you can.
Refreshing Cucumber Sunomono
Equipment
- 1 Sharp knife
- 1 Cutting board
- 1 Mixing bowl
- 1 Mandoline slicer (optional)
- 1 Whisk
Ingredients
- 2 small cucumbers English or Persian cucumbers preferred for their crisp texture
- 1 tablespoon salmon roe for garnish and added umami
- ¼ cup rice vinegar unseasoned
- 1 tablespoon sugar white granulated sugar
- ½ teaspoon salt fine sea salt
- 1 tablespoon sesame seeds toasted
Instructions
- Slice the cucumbers as thinly as possible, ideally using a mandoline slicer if available. If using a knife, aim for slices about 1/8 inch thick.
- In a mixing bowl, combine the rice vinegar, sugar, and salt. Whisk until the sugar and salt are fully dissolved, creating a clear, tangy dressing.
- Gently add the cucumber slices into the bowl with the dressing, tossing lightly to ensure each slice is evenly coated with the dressing. Let it marinate for 10 minutes to allow flavors to meld.
- To serve, use a slotted spoon to plate the cucumbers, allowing any excess dressing to drip off first to avoid a soggy presentation. Garnish with salmon roe and a sprinkle of toasted sesame seeds for aroma and texture.
Notes
Nutrition
Frequently asked questions
Can I make this ahead of time?
You can, but keep it under 20–25 minutes of marinating time if you want the cucumbers to stay crisp. If you need to prep further ahead, slice the cucumbers and mix the dressing separately, then combine them about 10 minutes before you sit down to eat.
Do I have to use rice vinegar, or can I use white vinegar?
White distilled vinegar will work in a pinch but it’s sharper and less mellow than rice vinegar, so reduce it slightly — try 3 tablespoons instead of 1/4 cup and taste as you go. Apple cider vinegar is a closer substitute if you have it.
My cucumbers got soggy — what happened?
They marinated too long or the slices were too thick. Keep the marinating window to 10–20 minutes and aim for the thinnest slices you can manage. Also make sure you’re plating with a slotted spoon so excess liquid stays in the bowl.
Can I add other vegetables or protein to make this more filling?
Yes — thinly sliced radishes or shredded carrots hold up well in the dressing and add color. For protein, small cooked shrimp or flaked canned crab stirred in just before serving turn this into a light main rather than a side.
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