Cucumber Red Onion Salad Recipe with Dill and Cucumber
There’s something about a bowl of thinly sliced cucumbers and red onions that feels like summer on a plate. This cucumber red onion salad with dill is one of those recipes I make on repeat—it’s simple, refreshing, and costs next to nothing.
The tangy vinegar dressing brightens up the crisp veggies, while fresh dill adds a pop of flavor. Whether you’re serving it alongside grilled chicken or just need a quick side for a weeknight dinner, this salad delivers.
Plus, it comes together in about 15 minutes with ingredients you probably already have in your fridge.
Why You’ll Love This Recipe
If you're looking for a side dish that's big on flavor but light on your wallet, this cucumber red onion salad is exactly what you need. It's made with just a handful of everyday ingredients—cucumbers, onions, dill, and basic pantry staples—so you can whip it up without a special trip to the store.
The prep couldn't be easier: no cooking required, just slicing and stirring. In about 15 minutes, you've got a crisp, refreshing salad that pairs beautifully with grilled meats, sandwiches, or anything from the grill. The flavors are bright and clean, thanks to the tangy vinegar dressing and fresh dill.
Plus, this salad actually gets better as it sits—the onions mellow out and the cucumbers soak up the dressing, so it's perfect for making ahead. Whether you're meal prepping for the week or packing a picnic, it holds up well in the fridge without getting soggy.
Ingredients You’ll Need
Let's talk about what goes into this salad. The ingredient list is short and simple, but each one plays an important role. Most of these are probably already in your kitchen, which makes this a great last-minute side dish.
Start with the cucumbers. English cucumbers are my go-to because they have thin skins and fewer seeds, so you don't have to peel them. If you're using garden cucumbers, you might want to peel them if the skin is tough.
Slice them thinly – a mandoline makes quick work of this, but a sharp knife works fine too. The red onion adds a nice bite; slice it just as thin so it doesn't overpower the salad. Fresh dill is non-negotiable here – dried just won't give you that same bright, herby flavor.
For the dressing, white vinegar keeps it classic, but apple cider vinegar adds a milder tang if you prefer that. Olive oil rounds out the acidity, and a little sugar balances the vinegar without making it sweet. Salt and pepper are essential, and if you like a little heat, a pinch of red pepper flakes is a nice touch.
Step-by-Step Instructions
Making this cucumber salad is quick and easy. The key is to slice the vegetables thinly so they absorb the dressing well, and to let the salad rest for a few minutes before serving. Here’s how to do it.
Step 1 – Slice the cucumbers and onion
Start by slicing the cucumbers and red onion into thin rounds. A mandoline slicer makes this job super fast and ensures even slices, but a sharp knife works just fine. Aim for about 1/8-inch thickness — thin enough to be tender but not so thin they turn to mush.
If you're using garden cucumbers with tough skins, you might want to peel them partially or fully, but English cucumbers have tender skins that are fine left on.
Step 2 – Make the dressing
In a small bowl, whisk together the white vinegar (or apple cider vinegar), olive oil, sugar, salt, and pepper. Keep whisking until the sugar is completely dissolved — this takes about 30 seconds. Taste the dressing and adjust seasoning if needed.
It should be tangy with a hint of sweetness.
Step 3 – Combine everything
Place the sliced cucumbers, red onion, and chopped fresh dill in a large bowl. Pour the dressing over the top and toss gently with your hands or a large spoon until all the vegetables are evenly coated. Be careful not to crush the cucumber slices.
Step 4 – Let it rest
Let the salad sit at room temperature for about 10 minutes. This resting time allows the flavors to meld and the onions to mellow slightly — they'll still have a bit of bite but won't be overpowering. Give it one more gentle toss before serving.
Step 5 – Serve or chill
You can serve this salad right away while it's still crisp, or pop it in the fridge for later. If you refrigerate it, know that the flavors will continue to develop and the cucumbers will soften a bit. It's delicious either way.
Tips for the Best Results
Getting the perfect crunch and balanced flavor in this cucumber red onion salad comes down to a few simple techniques. These tips will help you avoid a watery, bland salad and ensure every bite is refreshing and delicious.
For extra crunch, salt the sliced cucumbers and let them sit for 15 minutes, then pat dry before adding dressing. This draws out excess water. Use a mandoline for uniform slices—they look prettier and absorb dressing evenly.
Taste and adjust vinegar or sugar to your preference. Let the salad sit for 10 minutes before serving so the flavors meld, but don't let it sit too long or it will get soggy.
Common Mistakes to Avoid
- Skipping the salting step: If you don't draw out excess water from cucumbers, your salad will be watery and diluted.
- Using thick, uneven slices: Thick slices don't absorb dressing well and can be tough. Aim for thin, even rounds.
- Adding dressing too early: Dressing makes cucumbers soggy over time. Toss just before serving if you're not eating right away.
- Overpowering with vinegar: Start with less vinegar and add more to taste—some vinegars are stronger than others.
Easy Variations and Substitutions
One of the best things about this cucumber red onion salad is how easy it is to tweak based on what you have on hand or your personal taste. The basic formula is super forgiving, so don't stress if you're missing an ingredient or two.
If you're out of white vinegar, rice vinegar or fresh lemon juice both work beautifully—just use the same amount. For a pop of color, toss in thinly sliced bell peppers or halved cherry tomatoes. Craving a creamier version?
Stir in 2 tablespoons of sour cream or Greek yogurt after mixing the dressing; it'll give the salad a lush, tangy twist. No fresh dill? Substitute with 1 tablespoon of dried dill or swap in fresh parsley for a slightly different but equally fresh flavor.
How to Store and Reheat
Leftovers are a gift, but with a salad like this, you'll want to handle them right so they stay as tasty as possible. Here's the lowdown on keeping that crispness (or at least not losing all of it) and how to bring it back to life the next day.
How to Store It
Pop any leftover Cucumber Red Onion Salad into an airtight container and stash it in the fridge. It'll keep well for up to 3 days, though the cucumbers will soften over time as they continue to marinate. That's not a bad thing—the flavors meld and deepen, making it almost a different (but still delicious) salad.
Just don't freeze it; cucumbers turn into a watery mess when thawed.
How to Reheat It
This salad is meant to be served cold, so no reheating needed! In fact, warming it up would ruin the texture. If you find the flavors have mellowed after a day or two, simply drain off any excess liquid that's accumulated and add a splash of fresh vinegar or a squeeze of lemon juice.
Give it a good stir, and it'll perk right back up.
Frequently Asked Questions
Can I make this salad ahead of time?
Yes, but it's best within a few hours. The cucumbers will release water and the onions will mellow. If making ahead, store the dressing separately and toss just before serving.
How do I stop the red onion from being too sharp?
Soak the sliced onion in cold water for 10 minutes, then drain and pat dry. This removes some of the bite while keeping crunch.
What if I don't have fresh dill?
You can use dried dill, but use only 1 teaspoon. Fresh dill gives a brighter flavor, so it's worth getting if you can.
Can I use English cucumbers instead of regular?
Absolutely. English cucumbers have thinner skin and fewer seeds, so you may not need to peel or seed them. Just slice and go.
Is this salad gluten-free and vegan?
Yes, as written it's both gluten-free and vegan. Double-check your vinegar if you're sensitive—distilled white vinegar is gluten-free.
Cucumber Red Onion Salad with Dill
Ingredients
Method
- Slice the cucumbers and red onion into thin rounds using a sharp knife or mandoline.
- In a small bowl, whisk together the vinegar, olive oil, sugar, salt, and pepper until the sugar dissolves.
- In a large bowl, combine the sliced cucumbers, red onion, and chopped dill.
- Pour the dressing over the vegetables and toss gently to coat.
- Let the salad sit at room temperature for 10 minutes to allow flavors to meld.
- Serve immediately or refrigerate until ready to serve.
Conclusion
This cucumber red onion salad with dill is proof that simple ingredients can create something truly delicious. It’s crisp, tangy, and comes together in minutes without breaking the bank.
I hope you give it a try and make it your own—maybe add a little extra dill or a pinch of red pepper flakes. Either way, it’s a side dish that never disappoints.
