Some recipes don’t need a single fancy ingredient to earn a permanent spot on the dinner table, and this is one of them. Cucumber, onion, and vinegar salad is about as old-school as side dishes get — crisp cucumbers and sharp onions sitting in a tangy, lightly sweet vinegar dressing, ready in the time it takes to slice everything. No cooking, no complicated technique, just a cold, refreshing side that goes with almost anything off the grill.
Why You’ll Love This Recipe
- Ready in 10 minutes — this is a slice-and-stir recipe, no cooking required.
- Gets better as it sits. The longer it marinates, the more flavor it soaks up.
- Pairs with everything — burgers, grilled chicken, fried fish, barbecue, sandwiches, you name it.
- Naturally light and refreshing, especially on hot days when you want something crisp instead of heavy.
Ingredients
- 3 medium cucumbers, thinly sliced
- 1 medium sweet or red onion, thinly sliced
- ¾ cup white vinegar (or apple cider vinegar)
- ¼ cup water
- 3 tablespoons granulated sugar
- 1 teaspoon salt
- ½ teaspoon black pepper
- 1 tablespoon fresh dill, chopped (optional)
Instructions
- Slice the vegetables. Thinly slice the cucumbers and onion — a mandoline works well here if you want even, paper-thin slices, but a sharp knife is fine too.
- Salt the cucumbers (optional but recommended). Toss the cucumber slices with ½ teaspoon of salt and let them sit in a colander for 10 minutes to draw out excess water, then pat dry. This keeps the salad from getting watery.
- Make the dressing. In a bowl, whisk together the vinegar, water, sugar, salt, and pepper until the sugar fully dissolves.
- Combine. Add the cucumbers and onions to the dressing and toss well to coat everything evenly.
- Marinate. Cover and refrigerate for at least 30 minutes before serving — the flavor deepens the longer it sits, so an hour or two is even better.
- Finish and serve. Stir in the fresh dill if using, and serve cold straight from the fridge.
Tips for the Best Cucumber Onion Salad
- Slice thin, not thick. Thin slices soak up the vinegar dressing much better and give the salad its classic texture.
- Salting the cucumbers first is the single biggest trick for avoiding a watery, diluted salad by the next day.
- Adjust the sweetness to taste — for a sharper, less sweet version, cut the sugar down to 2 tablespoons.
- Swap the onion for a milder flavor by using green onions or shallots instead of a full onion.
Variations
- Creamy version: Stir in 2–3 tablespoons of sour cream or mayonnaise to the dressing for a creamy cucumber salad instead of a vinegar-based one.
- Spicy version: Add a pinch of red pepper flakes or a few thin slices of jalapeño.
- Herb swap: Fresh parsley or mint work well in place of dill for a different flavor direction.
Storage
Store in an airtight container in the fridge for up to 4–5 days. The salad actually tastes better on day two, once everything has had time to marinate fully.