Salads
This cucumber onion salad with white sauce delivers the perfect balance of crisp, refreshing vegetables and creamy tang in just 15 minutes—ideal for summer gatherings or a light lunch.
The secret lies in thinly slicing the cucumbers and onions for maximum crunch, then tossing them with a velvety white sauce that adds richness without overpowering the freshness.
I developed this recipe after years of testing salads that either tasted too heavy or lost their texture by the time they hit the table.
The white sauce—made with just mayo, sour cream, and a touch of lemon—binds the ingredients while keeping the salad light and satisfying. Unlike store-bought dressings, this homemade version stays fresh for days and lets the natural flavors of the cucumbers and onions shine.
The key is working quickly to prevent the vegetables from wilting, ensuring every bite has that satisfying crunch you crave in a summer salad.
What you’ll end up with is a dish that’s cool, creamy, and impossibly crisp—perfect for picnics, potlucks, or a quick weeknight meal. The contrast between the cool, refreshing vegetables and the smooth, tangy sauce makes this salad irresistible.
Plus, it’s customizable: swap in bell peppers for extra color or add a pinch of dill for a fresh herb note. Let’s get started!
This salad keeps well in the refrigerator for up to 3 days, making it a great make-ahead option for busy schedules. The flavors actually improve as the ingredients meld, so it’s perfect for meal prepping.
Whether you’re serving it as a side or a main dish, this recipe delivers restaurant-quality results with minimal effort. Ready to transform your next meal?
Ingredients for cucumber onion salad white sauce
Nine ingredients transform into a cool, creamy salad that's restaurant-quality in 15 minutes.
| Ingredient | Amount | Notes |
|---|---|---|
| Persian Cucumbers 🥒 | 2 lb | Thinly sliced lengthwise for crunch |
| Yellow Onions 🧅 | 1 whole | Thinly sliced into half-moons |
| Mayonnaise 🥛 | ½ cup | High-quality, full-fat preferred |
| Sour Cream 🧀 | ¼ cup | Full-fat for creaminess |
| Fresh Lemon Juice 🍋 | 2 tbsp | From a ripe Meyer lemon |
| Granulated Sugar 🍚 | 1 tbsp | Balances acidity in sauce |
| Fresh Dill 🌿 | ¼ cup | Finely chopped, stems removed |
| Diamond Crystal Kosher Salt 🧂 | ½ tsp | For seasoning sauce |
| Freshly Ground Black Pepper 🌶️ | ¼ tsp | Freshly cracked for bold flavor |
| Extra-Virgin Olive Oil 🫒 | 1 tbsp | Drizzled over finished salad |
| Red Wine Vinegar 🍷 | 1 tsp | Optional for extra tang |
The Persian cucumbers are non-negotiable here—their thin skin and crisp texture hold up beautifully. Trader Joe's and Whole Foods carry the best varieties, but any seedless cucumber works in a pinch. For the onions, yellow onions give the best balance of sharpness and sweetness—red onions can make the salad too bitter. Thinly slicing both veggies is key: use a mandoline or sharp knife for even slices that stay crisp. The dill? Fresh is a must—dried just won't cut it here. I always buy extra because half gets tossed in the sauce and half gets sprinkled on top.
No mayo? Greek yogurt mixed with lemon juice works beautifully for a lighter option. Short on sour cream? Substitute crème fraîche or extra mayo—just reduce the lemon juice slightly. The sugar can be swapped for honey or maple syrup if you prefer a different sweetness profile. For extra tang, add 1 tsp of Dijon mustard to the sauce. The red wine vinegar is optional but adds a sophisticated depth—Bartles & Jaymes is my go-to for a quick bottle opener. If you're making this ahead, hold off on adding the olive oil until serving to keep everything crisp.
This salad keeps for 3 days in the fridge, but the texture starts to soften after day 2. To maximize crunch, store the veggies and sauce separately until ready to serve. The sauce alone stays fresh for 5 days—perfect for batch prep. For meal prep, portion into glass containers with tight lids to maintain freshness. The flavors actually improve overnight as everything melds, so it's perfect for making ahead for parties or picnics. Want extra crunch? Toss in thinly sliced radishes or bell peppers before serving.
Why You'll Love This Recipe
- No-Fuss Assembly: I swear by this one—just slice the cucumbers, dice the onions, and mix. That’s it. No fancy techniques, no waiting for anything to cook. Honestly, I’ve made it while watching TV, and it still comes out perfect.
- Tangy Creamy Magic: The lemon juice cuts through the richness of the mayo and sour cream like a dream. That sharp bite from the onions? It’s the secret—makes every bite feel fresh and bright, even if you’re eating it cold the next day.
- Picnic Party Star: Between us, this is my go-to for potlucks or backyard BBQs. It’s light enough to eat by itself but hearty enough to pair with burgers or grilled chicken. Plus, it travels well—no soggy sides here.
- Budget Brightener: Persian cucumbers and yellow onions are cheap staples, and mayo/sour cream stretch far. I’ve fed six people for under $10 with this—leftovers? They disappear faster than I can say “second helpings.”
Step-by-step instructions for cucumber onion salad with white sauce
This refreshing salad comes together in minutes with crisp cucumbers and a creamy, tangy dressing.
Prepare the Vegetables for Maximum Crunch
Start by washing the 2 lb Persian cucumbers thoroughly and patting them completely dry with paper towels. Using a sharp chef's knife, slice each cucumber lengthwise into ¼-inch thick strips—this creates those signature ribbons that stay crisp. I like to work quickly here because cucumbers release water when cut, so I immediately transfer them to a colander and sprinkle with 0.5 tsp Diamond Crystal kosher salt. Let them sit for 5 minutes while you prep the onions.
After the salting time, rinse the cucumbers under cold water and drain well. This step removes excess moisture and prevents a watery salad. Meanwhile, peel the 1 whole yellow onion and slice it into paper-thin half-moons using a mandoline or sharp knife. Place both vegetables in a large mixing bowl and set aside. The onions should be translucent and delicate—if they're still opaque, slice them a bit thinner.
Whisk Together the Creamy White Sauce
In a medium bowl, combine the 0.5 cup mayonnaise, 0.25 cup sour cream, 2 tbsp fresh lemon juice, and 1 tbsp granulated sugar. Using a whisk or fork, stir until completely smooth and homogeneous. This base creates the signature creamy texture that balances the salad's crunch. I always use high-quality mayonnaise here—it makes a noticeable difference in flavor and texture.
Next, add the 0.25 cup finely chopped fresh dill, 0.25 tsp freshly ground black pepper, and 1 tsp red wine vinegar (if using). Mix gently to preserve the dill's vibrant color and freshness. The vinegar adds a subtle tang that brightens the entire dish. Taste the dressing before adding it to the vegetables—adjust seasoning with more sugar or lemon juice if needed. The sauce should be tangy but not overly acidic.
Combine and Chill for Perfect Texture
Pour the dressing over the cucumber and onion mixture in the large bowl. Using a silicone spatula, gently fold everything together until the vegetables are evenly coated. Be careful not to overmix—just enough to distribute the sauce. The salad should look vibrant with bright green cucumbers and white onions peeking through the creamy dressing.
Cover the bowl and refrigerate for at least 30 minutes before serving. This chilling time allows the flavors to meld and the vegetables to absorb the dressing without becoming soggy. If you're short on time, you can serve it immediately, but the flavors will develop more fully with time. The texture should be crisp yet tender, with a perfect balance of creamy and refreshing elements.
Finish with Olive Oil and Serve Immediately
Before serving, drizzle the salad with 1 tbsp extra-virgin olive oil and toss gently to combine. This final step adds a luxurious richness that complements the tangy dressing. The oil should glisten on the surface, indicating it's been evenly distributed. Taste one last time and adjust seasoning if needed—perhaps a pinch more salt or a squeeze of lemon juice for brightness.
Serve the salad immediately while the cucumbers are at their crispest. It pairs beautifully with grilled meats, sandwiches, or as a refreshing side for summer gatherings. The contrast of cool, creamy dressing with the crisp vegetables makes this salad incredibly satisfying—especially on warm days when you crave something light yet flavorful.
Pro Tips For Making Cucumber Onion Salad White Sauce
- Chill Before Mixing: Let your sliced cucumbers and onions sit in ice water for 10 minutes before draining. This stops them from releasing bitter water and keeps the salad crisp—no soggy texture after sitting for hours.
- Thin the Sauce: If your mayo-sour cream mix is too thick, add lemon juice gradually (start with 1 tablespoon) instead of milk. The acid brightens flavors and prevents the sauce from separating later.
- Salt the Onions: Toss thinly sliced yellow onions with ½ teaspoon salt and let them sit for 5 minutes before rinsing. This draws out moisture and mellows the sharpness—no more overpowering bite in your salad.
- Mix Last Minute: Combine the white sauce with cucumbers and onions right before serving. The longer they sit together, the more the cucumbers soften—especially if you’re prepping ahead. Keep them separate until the final fold.
Regional styles of this dish
Russian Zelenka Style
In Russia, this salad is known as Zelenka, a classic side that pairs perfectly with blini or cold cuts. The key difference is using white cabbage instead of cucumbers—thinly slice ½ small head and mix with the same white sauce.
Add 1 tbsp chopped fresh parsley and a pinch of smoked paprika for depth. Serve chilled as a traditional accompaniment to smoked salmon or herring. 🗺️
German Gurkensalat
Germany’s version, Gurkensalat, swaps sour cream for Greek yogurt and includes pickle juice instead of lemon. Thinly slice 1 lb Kirby cucumbers and toss with ½ cup dill pickles chopped plus 1 tsp caraway seeds for a tangy, crunchy bite.
This salad is a must at Oktoberfest tables and balances rich sausages beautifully. 🍺
Middle Eastern Mezze Twist
For a Middle Eastern touch, replace the white sauce with a yogurt-based dressing: mix ½ cup Greek yogurt with 1 tbsp tahini, 1 tsp sumac, and 1 minced garlic clove.
Add ½ cup diced cucumbers, ¼ cup thinly sliced red onion, and 2 tbsp chopped mint. Serve with warm pita or grilled lamb. The sumac adds a bright, citrusy kick that elevates the dish. 🌿
Southern U.S. Picnic Version
In the American South, this salad often appears at potlucks with a mayo-based dressing thickened with a splash of buttermilk. Add ½ cup diced celery and ¼ cup chopped green bell pepper for extra crunch.
A pinch of cayenne pepper (about ¼ tsp) gives it a subtle heat that pairs perfectly with fried chicken or barbecue. 🌶️
Japanese Sunomono-Inspired
For a lighter take, create a Japanese-inspired version by omitting the white sauce entirely. Toss 1 lb cucumber ribbons with 2 tbsp rice vinegar, 1 tsp sugar, and ½ tsp salt.
Add 1 tbsp toasted sesame seeds and 1 tsp grated ginger for a refreshing, umami-rich salad. Serve with sushi or grilled fish for a fresh contrast. ✨
Nutrition facts
Frequently asked questions
Can I make this salad without mayo?
Swap the mayo for ½ cup Greek yogurt mixed with 1 tbsp lemon juice to keep it light and tangy. The texture will be slightly thicker but still creamy. For extra richness, add 1 tbsp crème fraîche—just reduce the lemon juice slightly to balance the flavors.
Why do my cucumbers turn watery after mixing?
Cucumbers release water when cut, so salting them for 5 minutes before rinsing removes excess moisture. Always pat them completely dry with paper towels and work quickly to prevent a soggy salad. For extra crunch, chill the salad for 30 minutes before serving—this helps the vegetables firm up.
How long can I store the white sauce separately?
The white sauce stays fresh for 5 days in an airtight container in the fridge. Store it in a separate container from the veggies to maintain texture. When ready to serve, toss the sauce with the cucumbers and onions just before eating for the crispiest results.
Can I add other vegetables to this salad?
Yes! Thinly sliced radishes, bell peppers, or celery add great crunch and color. For a Southern twist, include ½ cup diced celery and green bell pepper. Just be mindful of the salad’s balance—too many veggies can dilute the creamy dressing.
Is this salad kid-friendly?
The mild flavors and creamy texture make it a hit with kids. For picky eaters, serve the cucumbers and onions separately with the sauce on the side. You can also reduce the onion amount or swap it for green onions for a milder taste.