Easy Pickled Cherry Tomatoes, Red Onions, and Cucumbers

By: Susan Updated on Sat, 24 Jan 2026 15:22:48 GMT Condiments

Tags: #vegan #gluten-free

Jar of pickled cherry tomatoes, red onions, and cucumbers with dill Pin it
Jar of pickled cherry tomatoes, red onions, and cucumbers with dill

When the garden hands you too many cherry tomatoes and cucumbers, this is the move. A quick pickle brine turns those extras into a jar of tangy, crunchy bites you can pull out all week.

No water bath, no special gear, and no waiting a month. You slice, heat, pour, and chill. In a couple of hours you have a condiment that beats anything from the grocery shelf.

I keep a jar in the fridge from July through September. They land on tacos, grain bowls, and straight off a fork when I am standing in front of the open door.

What goes in the jar

This is a pantry recipe that rewards fresh produce. Look for firm cherry tomatoes, a crisp cucumber, and a tight red onion without soft spots. The rest is probably already in your kitchen.

  • Cherry tomatoes. Halved so the brine penetrates fast. A mix of colors makes the jar look as good as it tastes.
  • English cucumber. Thin skin and small seeds mean less bitterness and better crunch after pickling.
  • Red onion. Sliced paper-thin so it tames into something sweet and mild instead of harsh.
  • White vinegar. The clean acid backbone. Apple cider vinegar works too but darkens the brine slightly.
  • Sugar and salt. Sugar rounds out the sharp vinegar edge. Salt seasons the vegetables and helps them stay crisp.
  • Garlic and black peppercorns. Warm background notes without stealing the show.
  • Fresh dill. Optional but classic. Tuck sprigs between the layers so every bite carries a little herb.

How the brine comes together

  1. Prep the vegetables. Halve the tomatoes, slice the cucumber into thin rounds, and shave the onion on a mandoline or with a sharp knife. Pack them into a clean quart jar, alternating colors.
  2. Heat the brine. Combine white vinegar, water, sugar, salt, smashed garlic, and peppercorns in a small saucepan. Bring it to a gentle simmer and stir until the sugar and salt dissolve completely. This takes about three minutes.
  3. Pour and submerge. Let the brine cool for two to three minutes so it does not blast the tomatoes and split their skins. Pour it over the vegetables, pressing everything down with a chopstick so no air pockets remain.
  4. Chill and wait. Seal the jar and let it sit at room temperature until cool, then move it to the refrigerator. They are edible after two hours but reach their best flavor after a full day.
Easy Pickled Cherry Tomatoes, Red Onions, and Cucumbers
Easy Pickled Cherry Tomatoes, Red Onions, and Cucumbers

Why temperature matters

Hot brine softens vegetables just enough to let the vinegar in, but boiling liquid straight from the pot can turn cherry tomatoes into mush and make cucumbers flabby. I let the brine drop from a boil to a hot tap-water temperature before I pour. The tomatoes stay whole, the cucumbers keep their snap, and the onion slices stay bright pink instead of gray.

Swaps for your own spin

Swap white vinegar for rice vinegar if you want a softer, slightly sweet tang. Add a pinch of red pepper flakes or a sliced jalapeno for heat. Coriander seeds, mustard seeds, or a strip of lemon peel all play well here. If you prefer pickled carrots or cauliflower, blanch them for ninety seconds first so they pickle at the same rate as the raw vegetables.

If you enjoy building a pickle collection, try our Quick and Easy Zesty Pickled Sweet Peppers and Onions or the tangy Pickled Pepper and Onion Relish next.

Best ways to use them

These pickles are built for everyday eating. Pile them on grilled burgers or pulled pork sandwiches where the acid cuts through rich meat. Spoon them over a cherry tomato couscous salad for extra crunch and tang. They also brighten a simple hummus plate or a charcuterie board.

Do not throw out the brine when the jar is empty. Whisk it with olive oil for a sharp salad dressing, or splash it into a marinade for chicken. The U.S. FDA offers solid guidance on safe produce handling at home, see the FDA produce safety guidelines.

Fridge life and food safety

Keep the jar sealed in the refrigerator. Because these are refrigerator pickles and not canned, they are not shelf-stable. They stay bright and crisp for up to three weeks, though the onions will deepen in color and the garlic will mellow.

Easy Pickled Cherry Tomatoes, Red Onions, and Cucumbers
Easy Pickled Cherry Tomatoes, Red Onions, and Cucumbers

FAQs

Can I use apple cider vinegar instead of white?

Yes. It gives a fruitier, slightly darker brine. White distilled vinegar keeps the liquid crystal clear and the flavor sharp.

How soon can I eat them?

They are safe after two hours, but the vegetables will still taste raw around the edges. Wait twenty-four hours for the vinegar to fully penetrate and the flavors to balance.

Why are my cucumbers soft?

Soft pickles usually mean the brine was too hot or the cucumbers were past their prime. Start with firm, unwaxed cucumbers and let the brine cool a few minutes before pouring.

Can I add carrots or peppers?

Absolutely. Cut dense vegetables thinly so they pickle at the same speed. For very hard veggies, a quick thirty-second blanch helps them absorb the brine.

Do these need to be canned?

No. These are refrigerator pickles. They stay in the fridge from start to finish and last up to three weeks. For canning safety standards, consult the National Center for Home Food Preservation.

How do I use the leftover brine?

Strain it and whisk with olive oil for a punchy vinaigrette. It also makes a great marinade base for grilled chicken or tofu.

Can I cut the sugar?

Yes. The sugar only softens the vinegar bite. You can reduce it by half or substitute honey. Taste the cooled brine before pouring and adjust.

References

Sources cited in this recipe.

Easy Pickled Cherry Tomatoes, Red Onions, and Cucumbers

Prep time:
10 min
Cook time:
5 min
Total time:
15 min
Servings:
8
Jar of pickled cherry tomatoes, red onions, and cucumbers with dill
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Bright quick pickles with cherry tomatoes, red onion, and cucumber in a tangy brine. No canning needed, ready in hours.

Ingredients

  • Vegetables

  • Brine

Instructions

1.

1. Prep the vegetables: Halve the cherry tomatoes, slice the cucumber into thin rounds, and shave the red onion on a mandoline or with a sharp knife. Pack them into a clean quart jar, alternating colors.

2.

2. Make the brine: Combine white vinegar, water, sugar, salt, smashed garlic, peppercorns, and red pepper flakes in a small saucepan. Bring to a gentle simmer over medium heat, stirring until the sugar and salt dissolve completely, about 3 minutes.

3.

3. Pour and seal: Let the brine cool for 2 to 3 minutes, then pour it over the vegetables. Press down with a chopstick to remove air pockets and ensure everything is submerged. Seal the jar.

4.

4. Chill and pickle: Let the jar cool to room temperature, then refrigerate for at least 2 hours. For best flavor, wait 24 hours before serving.

Good to know

  1. Best after 24 hours of chilling.
  2. Keeps in the refrigerator for up to 3 weeks.

Equipment

  • Small saucepan
  • Quart jar with lid
  • Sharp knife or mandoline
  • Chopstick or butter knife

Allergens

Always check labels if you have allergies.
  • None

Nutrition facts

Values are estimates per serving.
  • Calories: 25
  • Fat: 0 g
  • Carbs: 5 g
  • Protein: 0.5 g