This 3-ingredient cucumber onion salad is one of those humble, hard-times recipes that somehow still feels special. My grandfather swore by it every summer, pulling cucumbers and onions straight from the garden and turning them into a big tub of this crisp, tangy salad. It’s incredibly cheap, refreshing on hot days, and comes together in minutes with just cucumbers, onions, and a simple vinegar-salt brine. Perfect for keeping in the fridge to scoop out alongside whatever you’re grilling or baking.
This salad is perfect alongside grilled burgers, hot dogs, or brats, and it brightens up heavier dishes like casseroles or meatloaf. I like to set the plastic container right on the picnic table so everyone can scoop some onto their plates or even pile it on sandwiches for extra crunch. It’s also great with baked chicken, fish, or a pot of beans and cornbread. Serve it well-chilled, and don’t be shy about spooning some of the tangy liquid over the top of whatever else is on your plate.
3-Ingredient Cucumber Onion SaladServings: 6
Ingredients
4 medium garden cucumbers, very thinly sliced
1 medium white onion, very thinly sliced
1 cup distilled white vinegar
1 cup cold water
1 tablespoon salt
Directions
Peel the cucumbers if the skins are thick or tough, or leave the peel on if they are tender. Slice the cucumbers into very thin rounds so they stay crisp and soak up the brine. Place them into a clean, medium-size clear plastic tupperware container with a tight-fitting lid.
Peel the white onion and slice it into very thin half-moons or rings. Separate the slices with your fingers and add them to the container with the cucumbers, spreading them out so the onion is mixed through the cucumbers.
In a measuring cup or small bowl, stir together the distilled white vinegar, cold water, and salt until the salt is mostly dissolved. This simple brine is what my grandfather used—sharp, clean, and pantry-friendly.
Pour the vinegar mixture over the cucumbers and onions in the tupperware. The vegetables should be just covered in the clear liquid; gently press them down with a clean spoon if needed so they sit in the brine.
Seal the container with the lid and give it a gentle shake to help everything mix. Place the container in the refrigerator for at least 1 hour before serving so the cucumbers and onions can chill and soak up the flavor. For the best flavor and crunch, let it sit 4 to 6 hours or overnight, giving the container a light shake whenever you think of it.
Serve the cucumber onion salad straight from the tupperware, using tongs or a slotted spoon to scoop out the cucumbers and onions. Spoon a little of the brine over the top if you like it extra tangy. Keep any leftovers covered in the fridge and enjoy within 3 to 4 days while everything is still fresh and crunchy.
Variations & Tips
To keep this true to the spirit of a hard-times, garden-side dish, the base stays just cucumbers, onions, and a simple vinegar-salt brine, but you can still make small tweaks if needed. For a milder bite, rinse the sliced onions briefly under cold water and pat dry before adding to the container. If your family is sensitive to raw onion, use half an onion or replace some of it with extra cucumber. If the vinegar is too sharp for picky eaters, add up to 1 teaspoon of sugar to the brine, or increase the water slightly to soften the tang. You can also switch to a sweeter onion (like Vidalia) if white onion feels too strong. For extra crunch, choose firm cucumbers and slice them just before brining; if using garden cucumbers with large seeds, scrape out the seeds with a spoon before slicing. Food safety tips: Always start with clean hands, a clean knife, and a clean cutting board. Store the salad tightly covered in the refrigerator at or below 40°F (4°C), and never leave it out at room temperature for more than 2 hours (1 hour if it’s very hot outside at a picnic). Use fresh cucumbers and onions without soft spots or mold, and discard the salad if it ever smells off, looks slimy, or has been stored more than 3 to 4 days. Do not attempt to can this salad as-is; it is meant for quick pickling in the fridge, not for long-term shelf storage.
