These low carb 3-ingredient vinegar cucumbers are my version of the kind of jar my great aunt kept in the icebox all summer: cool, tangy, and wonderfully crunchy. This is a very old Midwestern-style quick pickle—really more of a marinated salad than a true canned pickle—built on three simple ingredients: cucumbers, onion, and seasoned rice vinegar. You get all the refreshing snap of classic vinegar cucumbers without any added sugar or complicated steps, and they’re ideal for keeping a glass dish or jar in the fridge so you can grab a forkful whenever you need something crisp and bright.
Serve these vinegar cucumbers ice-cold, straight from the refrigerator, alongside grilled meats, burgers, or brats, or tuck them next to a simple roast chicken or seared fish to cut through the richness. They’re great spooned over a bed of mixed greens for an instant low-carb salad, or piled onto bunless burgers and lettuce-wrapped sandwiches for extra crunch. I also like to set the glass dish right on the table with a slotted spoon so everyone can help themselves to a cool, tangy bite between heavier dishes—especially in the heat of summer.
Low Carb 3-Ingredient Vinegar CucumbersServings: 6
Ingredients
4 cups thinly sliced cucumbers (about 2 large cucumbers, peeled or unpeeled)
1 cup thinly sliced white onion rings
1 1/2 cups seasoned rice vinegar (zero-sugar or no-added-sugar, to keep it low carb)
Directions
Slice the cucumbers into very thin rounds, about 1/8 inch thick. You can peel them first if the skins are thick or waxy, but leaving them on adds color and a bit more texture.
Slice the white onion into thin rings. Separate the rings with your fingers so they mix easily with the cucumbers.
In a glass baking dish or shallow glass container, scatter in half of the cucumber slices, then half of the onion rings. Repeat with the remaining cucumbers and onions to create light layers. This helps everything stay evenly submerged and crunchy.
Pour the seasoned rice vinegar over the cucumbers and onions. Gently press the vegetables down with a clean spoon so they are just covered by the clear brine. If needed, add a splash more vinegar until everything is submerged.
Cover the dish tightly with a lid or plastic wrap and refrigerate for at least 2 hours, or until the cucumbers are very cold and have absorbed some of the tangy flavor. For the best flavor and crunch, let them sit 8–24 hours before serving.
Serve the vinegar cucumbers well-chilled, straight from the refrigerator, making sure each serving includes both cucumber rounds and onion rings. Store covered in the fridge and enjoy within 5–7 days for the best texture and flavor.
Variations & Tips
To keep this true to its three-ingredient spirit, I rely on seasoned rice vinegar for both salt and gentle sweetness; choosing a zero-sugar or no-added-sugar version keeps the recipe low carb while giving you that classic cool-and-tangy flavor. If you’d like a slightly sharper bite, you can swap in part white vinegar or apple cider vinegar for some of the seasoned rice vinegar, but taste as you go and stay within the three-ingredient framework by not adding extra seasonings. For a more delicate texture, use English (hothouse) cucumbers; for extra crunch, choose firm pickling cucumbers and slice them just a bit thicker. Food safety tips: always use clean utensils when serving so you’re not introducing bacteria into the brine, and keep the cucumbers refrigerated at all times—this is a quick refrigerator pickle, not a shelf-stable canned product. Discard the batch if it develops an off odor, slimy texture, or cloudiness that wasn’t there initially. If the cucumbers start to soften after several days, they’re still safe if they smell and look fine, but they’re best enjoyed while they’re at their crispest in the first few days.
