Sweet & Spicy Pickled Onion Pepper Relish

This Sweet & Spicy Pickled Onion Pepper Relish is tangy, colorful, slightly sweet, and packed with a delicious kick of jalapeño heat. 🧅🌶️🫙 Finely diced onions, red, green, and yellow bell peppers, and fresh jalapeños simmer in a sweet-tart vinegar brine seasoned with mustard seeds, celery seeds, red pepper flakes, and black pepper.

Unlike a raw refrigerator pickle, the vegetables in this relish are gently simmered in the brine. This softens them just enough while maintaining some texture and allows the onions and peppers to absorb plenty of sweet, tangy flavor. A final uncovered simmer concentrates the mixture and gives the relish its glossy, spoonable consistency.

The combination of apple cider vinegar and white vinegar creates a flavorful balance of fruity acidity and sharp tang, while sugar softens the edges of the vinegar and jalapeño heat. Optional turmeric adds warm color and another subtle layer of spice.

Keep a jar in the refrigerator and spoon it over burgers, hot dogs, sausages, pulled pork, tacos, grilled chicken, or sandwiches. For an easy appetizer, serve it over softened cream cheese with plenty of crackers.

Why You’ll Love This Sweet & Spicy Pickled Onion Pepper Relish

Sweet, tangy, and spicy. Sugar balances the vinegar and jalapeño heat for an addictive sweet-and-sour flavor.

Packed with colorful peppers. Red, green, and yellow bell peppers make the relish especially vibrant.

Loaded with onion flavor. Yellow or Vidalia onions create a savory-sweet foundation.

Easy refrigerator relish. There’s no shelf-stable canning process required.

Perfectly spoonable. Finely diced vegetables create a texture that’s easy to pile onto burgers, hot dogs, and sandwiches.

Adjustable heat. Remove the jalapeño seeds and membranes for a milder relish.

Great for entertaining. Spoon it over cream cheese and serve with crackers for an incredibly easy appetizer.

Better after chilling. Several hours in the refrigerator allow the sweet, spicy, and tangy flavors to develop.

Ingredients You’ll Need

Here’s everything you’ll need to make this colorful refrigerator relish.

• 2 large yellow or Vidalia onions, finely diced — Create the savory-sweet base of the relish.
• 1 red bell pepper, finely diced — Adds sweetness, crunch, and vibrant red color.
• 1 green bell pepper, finely diced — Provides fresh pepper flavor and color contrast.
• 1 yellow bell pepper, finely diced — Adds another layer of sweetness and bright color.
• 2 jalapeños, finely minced — Bring fresh chile flavor and heat. Remove the seeds and membranes for less spice.
• 1 cup apple cider vinegar — Provides tanginess with a slightly fruity character.
• ½ cup white vinegar — Adds sharper acidity to balance the sweeter apple cider vinegar.
• ½ cup water — Helps create a balanced pickling liquid.
• ½ cup granulated sugar — Gives the relish its characteristic sweet-and-tangy flavor.
• 1 tbsp kosher salt — Seasons the vegetables and balances the sweetness.
• 1 tsp mustard seeds — Add classic savory pickling flavor.
• ½ tsp celery seeds — Bring an aromatic note that works especially well in relishes.
• ½ tsp red pepper flakes — Add another layer of chile heat.
• ¼ tsp black pepper — Provides subtle peppery warmth.
• ¼ tsp turmeric, optional — Adds warm color and a subtle earthy note.

How to Make Sweet & Spicy Pickled Onion Pepper Relish

This refrigerator relish requires only about 20 minutes of cooking before it’s ready to cool and chill.

Step 1: Prepare the Onions

Peel the yellow or Vidalia onions.

Finely dice them into small, relatively even pieces.

Keeping the vegetables similar in size gives the finished relish a more consistent texture.

Step 2: Prepare the Bell Peppers

Remove the stems, seeds, and membranes from the red, green, and yellow bell peppers.

Finely dice the peppers into pieces similar in size to the onions.

Step 3: Prepare the Jalapeños

Finely mince the fresh jalapeños.

For a milder relish, remove the seeds and membranes before chopping.

After handling jalapeños, wash your hands, knife, and cutting board thoroughly and avoid touching your eyes or face.

Step 4: Make the Pickling Brine

Add the apple cider vinegar, white vinegar, water, granulated sugar, kosher salt, mustard seeds, celery seeds, red pepper flakes, black pepper, and optional turmeric to a medium saucepan.

Stir everything together.

Step 5: Heat the Brine

Place the saucepan over medium heat.

Bring the mixture to a gentle boil, stirring until the sugar and salt have completely dissolved.

Step 6: Add the Vegetables

Stir the diced onions, bell peppers, and minced jalapeños into the hot brine.

Reduce the heat.

Step 7: Simmer the Relish

Gently simmer the vegetables for 8–10 minutes, stirring occasionally.

The onions and peppers should begin to soften while still maintaining some texture.

Avoid cooking them until mushy.

Step 8: Reduce the Relish

Continue cooking uncovered for another 5–8 minutes.

The vegetables should become tender and glossy, with some flavorful pickling liquid still remaining.

Don’t cook away all of the liquid—the relish should remain moist and spoonable.

Step 9: Cool

Remove the saucepan from the heat.

Allow the relish to cool for approximately 20–30 minutes.

Step 10: Transfer to Jars

Spoon the cooled relish along with its remaining pickling liquid into clean airtight glass jars or containers.

Step 11: Chill

Cover tightly and refrigerate for at least 4 hours before serving.

For the best developed flavor, refrigerate the relish overnight.

Step 12: Serve

Stir the chilled relish and spoon it over your favorite savory dishes.

How to Serve Sweet & Spicy Onion Pepper Relish

This colorful relish is extremely versatile and adds instant sweet-tangy flavor to everyday meals.

• On burgers — Spoon it over beef, chicken, turkey, or veggie burgers.
• On hot dogs — Use it as a flavorful alternative to traditional pickle relish.
• With sausages — The sweet acidity pairs beautifully with rich grilled sausages.
• With pulled pork — Add a generous spoonful to pulled pork sandwiches.
• On tacos — Use it as a sweet, spicy topping for beef, pork, or chicken tacos.
• With grilled chicken — Spoon the chilled relish over freshly grilled chicken.
• On sandwiches — Add it to deli, chicken, pork, or cheese sandwiches.
• With wraps — Use a small amount to add acidity and crunch to savory wraps.
• Over cream cheese — Spoon the relish over softened cream cheese and serve with crackers for an easy appetizer.
• On snack boards — Serve a small bowl alongside cheese, crackers, meats, and other pickled vegetables.

Tips for the Best Pickled Onion Pepper Relish

Dice the vegetables finely. Small pieces create the best relish texture and make it easier to spoon onto food.

Keep the pieces relatively uniform. Evenly sized vegetables cook more consistently.

Use Vidalia onions for extra sweetness. Yellow onions work beautifully too, but Vidalia onions provide a naturally sweeter flavor.

Adjust the jalapeño heat. Remove the seeds and membranes if you prefer a milder relish.

Be careful when handling jalapeños. Wash your hands thoroughly afterward and avoid touching your face.

Dissolve the sugar and salt completely. Stir the brine as it heats until no visible granules remain.

Don’t overcook the vegetables. They should soften but shouldn’t become mushy.

Don’t reduce the relish completely dry. Leave some pickling liquid so the finished relish stays moist and flavorful.

Don’t skip the chilling time. Four hours gives the flavors time to develop.

For even better flavor, chill overnight. The onions, peppers, spices, vinegar, and sweetness become more integrated as they rest.

Always use a clean utensil. This helps maintain the quality of the refrigerated relish.

Storage Information

Transfer the cooled Sweet & Spicy Pickled Onion Pepper Relish to clean airtight jars or containers and keep refrigerated.

Store for up to 2 weeks.

Always use a clean spoon when removing relish from the container.

Discard the relish if you notice mold, an unusual odor, or other signs of spoilage.

This recipe is specifically designed as a refrigerator relish and is not intended for shelf-stable canning or pantry storage.

Frequently Asked Questions

Is this relish sweet or spicy?

It’s both. The sugar creates noticeable sweetness, while jalapeños and red pepper flakes provide heat. Vinegar gives the relish its tangy finish.

Can I make the relish less spicy?

Yes. Remove the seeds and membranes from the jalapeños before mincing them.

Can I use Vidalia onions?

Yes. Vidalia onions are an excellent choice if you want a naturally sweeter onion flavor. Regular yellow onions also work.

Why use both apple cider vinegar and white vinegar?

Apple cider vinegar contributes fruity tanginess, while white vinegar provides a cleaner, sharper acidity. Together they create a balanced brine.

Why are celery seeds added?

Celery seeds add a distinctive aromatic flavor commonly used in pickles and relishes.

Is turmeric required?

No. It’s optional and primarily adds warm color along with a subtle earthy flavor.

Should the vegetables remain crunchy?

They should soften during simmering while retaining some texture. Avoid cooking them until completely mushy.

Why is the relish simmered uncovered at the end?

The uncovered simmer allows some liquid to evaporate, concentrating the flavor and creating a thicker, spoonable consistency.

How long should the relish chill?

Refrigerate for at least 4 hours. For the best developed flavor, let it chill overnight.

What is the easiest appetizer to make with this relish?

Spoon the chilled relish over softened cream cheese and serve it with crackers.

What else can I serve it with?

It’s delicious with burgers, hot dogs, sausages, pulled pork, tacos, grilled chicken, sandwiches, and wraps.

How long does Sweet & Spicy Pickled Onion Pepper Relish last?

Keep it covered in the refrigerator and use within 2 weeks.

Can I store this relish in the pantry?

No. This is a refrigerator relish and hasn’t been formulated or processed for shelf-stable canning.

Recipe Card

Prep Time: 15 minutes
Cook Time: 20 minutes
Chill Time: 4 hours
Total Time: 4 hours 35 minutes
Servings: 12
Calories: Approximately 45 calories per serving

This Sweet & Spicy Pickled Onion Pepper Relish combines colorful bell peppers, onions, jalapeños, apple cider vinegar, mustard seeds, celery seeds, and red pepper flakes in one irresistible sweet-tangy condiment.

Give it at least four hours in the refrigerator—or preferably let it chill overnight—then spoon it generously over burgers, hot dogs, sausages, pulled pork, tacos, grilled chicken, and sandwiches. And for an effortless party appetizer, pour it over softened cream cheese and bring out the crackers.

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