Sweet and Tangy Balsamic Red Onions

Elevate Your Meals: The Ultimate Marinated Balsamic Red Onions Recipe

Imagine a burger, a salad, or even a simple grain bowl, elevated by a single, incredible topping. That’s exactly what you get with these Marinated Balsamic Red Onions. More than just a condiment, they’re a burst of tangy, sweet, and savory flavor that creates a perfect “umami dance” in your mouth. While often associated with gourmet burgers, these versatile onions are equally at home on a fresh salad, piled high on a hot dog, or as a vibrant addition to an elegant charcuterie board. Get ready to transform your everyday meals into something extraordinary with minimal effort.

Close-up of vibrant marinated balsamic red onions, glistening and ready to serve.
Perfectly marinated balsamic red onions ready to enhance any dish.

I’ve been making marinated onions for years, typically using white vinegar or lime juice for tacos. However, this specific balsamic version was crafted with a particular purpose in mind: to elevate a chicken burger. We all know that chicken and turkey burgers, while lean and delicious, can sometimes benefit from a little extra flavor punch. These balsamic red onions deliver just that – an easy, full-flavored recipe that instantly upgrades anything you put them on. And the best part? You only need a few simple ingredients: red onions, balsamic vinegar, sugar, olive oil, and a mere two hours for the flavors to meld beautifully. Let’s dive into how to create this culinary magic.

Why These Marinated Balsamic Red Onions Are a Must-Make

Beyond their incredible taste, these marinated red onions offer a multitude of benefits that make them a staple in any kitchen. They’re incredibly easy to prepare, requiring minimal cooking skills and just a handful of pantry staples. The active prep time is literally just minutes, making them perfect for busy weeknights or last-minute meal enhancements. They’re also highly versatile, moving effortlessly from a casual family dinner to a sophisticated gathering.

What sets this balsamic version apart is the depth of flavor. Balsamic vinegar, with its rich, sweet, and complex notes, transforms the sharp bite of red onion into a mellow, yet tangy, delight. The touch of sugar balances the acidity, while olive oil adds a silky richness. The result is an onion that’s simultaneously sweet, savory, and tangy, adding a bright acidity and satisfying crunch to any dish. They’re a fantastic way to introduce new textures and flavors without spending hours in the kitchen.

Crafting Your Marinated Balsamic Red Onions: A Simple Guide

Making these flavorful onions is surprisingly straightforward. The key lies in the slicing and the quality of your ingredients. Here’s a detailed breakdown:

How to Make Marinated Balsamic Red Onions

  1. Slice the Red Onion: Begin by slicing one medium red onion into thin, uniform pieces, aiming for about 1/8 inch thick. Uniform slices ensure even marination and a consistent texture. A mandoline slicer can make this process quicker and more precise, but a sharp knife and a steady hand work just as well.
  2. Combine Ingredients: Place the thinly sliced onions into a small, shallow bowl or a jar with a tight-fitting lid. Next, pour in the balsamic vinegar, extra virgin olive oil, salt, pepper, and sugar. If you choose to add dried Italian herbs for an extra layer of flavor, now is the time.
  3. Mix and Marinate: Secure the lid on your bowl or jar and shake vigorously until all the ingredients are thoroughly mixed, and the onions are fully coated in the balsamic liquid. For optimal results, allow the onions to marinate on the counter for at least an hour, or ideally two hours, stirring or shaking every 30 minutes to ensure every slice soaks up the delicious flavors. This gentle agitation helps the onions soften slightly and absorb the marinade evenly.
  4. Refrigerate for Storage: Once marinated, these onions can be stored in the refrigerator for up to 3 days, becoming even more flavorful over time. Make sure they are submerged in the liquid to stay fresh and tangy.
Whole, unpeeled red onions on a cutting board, ready for slicing.
Fresh, vibrant red onions.
Thinly sliced red onions in a bowl with balsamic vinegar, olive oil, and seasonings.
Sliced red onions, vinegar, seasoning, ready to marinate.
Jar of red onions marinating in balsamic vinegar on a countertop.
Marinate for a couple of hours for best flavor.
Close-up of finished marinated balsamic red onions in a bowl, showing their softened texture and rich color.
Perfectly seasoned, quick marinated onions.

Tips for Perfect Marinated Balsamic Red Onions

  • Slice Thinly: This is crucial for texture and absorption. Thinner slices mean faster marinating and a more tender, less harsh bite.
  • Quality Ingredients: Use a good quality balsamic vinegar and extra virgin olive oil. The flavor of these ingredients will shine through.
  • Don’t Skimp on Sugar: The sugar isn’t just for sweetness; it balances the acidity of the vinegar and enhances the onions’ natural sweetness.
  • Season to Taste: Feel free to adjust the salt and pepper to your preference. A pinch of red pepper flakes can add a subtle kick!
  • Experiment with Herbs: While optional, a touch of dried Italian herbs (like oregano, basil, thyme) can add an aromatic dimension to your marinated onions.
  • Marination Time: While they’re good after an hour, letting them sit for 2 hours or even overnight in the fridge significantly deepens their flavor. The longer they marinate, the more mellow and integrated the flavors become.

How to Use Your Flavorful Marinated Balsamic Red Onions

Just like many of my homemade dressings and sauces, I adore the versatility of these marinated red onions. Their bright, tangy, and slightly sweet profile makes them an excellent companion to a wide array of dishes. Here are some of my favorite ways to incorporate them:

  • Burgers and Sandwiches: The absolute classic! Pile them high on beef, chicken, turkey, or veggie burgers. They also make an incredible addition to grilled cheese, deli sandwiches, or a savory breakfast bagel.
  • Hot Dogs and Sausages: Forget plain relish! These onions add a gourmet touch to any hot dog or sausage.
  • Salads and Grain Bowls: Add a pop of color and flavor to any green salad or hearty grain bowl. They pair particularly well with Mediterranean or simple vinaigrettes.
  • Charcuterie and Antipasto Boards: Their vibrant color and complex flavor make them a beautiful and delicious component for any cheese and meat platter. They cut through the richness of cheeses and cured meats perfectly.
  • Tacos and Fajitas: While I often use white vinegar for tacos, the balsamic version adds a delightful sweetness that complements grilled meats and vegetables.
  • Eggs and Breakfast Dishes: A spoonful over scrambled eggs, an omelet, or even avocado toast provides a fantastic savory zing to your morning.
  • Roasted Vegetables: Toss them with roasted root vegetables or green beans for an extra layer of flavor.
  • Pizza Topping: A surprising but delicious addition to a gourmet pizza, especially with goat cheese or arugula.

Oh, and don’t discard that leftover balsamic vinegar mixture! It’s packed with flavor. Simply add a bit more extra virgin olive oil to taste, perhaps a pinch of those dried Italian herbs, and you’ve got a ready-made, exquisite salad dressing. It’s a fantastic way to minimize waste and maximize flavor!

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Close-up of perfectly marinated balsamic red onions, ready to be served as a delicious topping.

Marinated Balsamic Red Onions

Ana | Claudia’s Table

February 20, 2022

A perfect umami dance in your mouth. These tangy onions are a versatile topping for salads, grain bowls, and a fantastic addition to any charcuterie board or burger.

4.80 from 15 votes
Print Recipe
Pin Recipe
Prep Time
5 minutes
resting time
1 hour
Total Time
1 hour 5 minutes
Course Side Dish
Cuisine American
Servings 8
Calories 53 kcal

Equipment

  • 1 bowl with lid or jar

Ingredients

  • 1 medium red onion cut into 1/8″ thick slices
  • 1 cup balsamic vinegar
  • 1 tsp salt kosher
  • 1 tsp sugar white
  • 1/2 tsp pepper course ground
  • 1 tbsp olive oil extra virgin
  • dried Italian herbs optional, for added flavor

Instructions

  • Start by slicing the red onion into thin slices, about 1/8 inch thick each. Uniformity is key for even marination.
  • Place sliced onions in a small, shallow bowl or a jar with a lid. Add the balsamic vinegar, extra virgin olive oil, salt, pepper, and sugar. Include dried Italian herbs if desired.
  • Place the lid on the bowl or jar and shake vigorously until all ingredients are mixed well and the onions are fully coated.
  • Allow to marinate on the counter for at least 1 hour, ideally 2 hours, stirring or shaking every 30 minutes. For longer storage, place in the fridge for up to 3 days.
  • The leftover onion vinegar mixture can be repurposed as a delicious salad dressing. Simply add more olive oil to taste and a dash of dried Italian herbs.

Notes

For an even deeper flavor, let the onions marinate overnight in the refrigerator. They will become softer and more infused with the balsamic goodness.

Nutrition

Calories: 53kcal

Nutritional information is calculated online and should be used as a guide.

Keyword burger toppings, marinated onions, pickled onions, balsamic onions, red onion recipe, easy topping

All content and photographs ©Claudia’s Table and claudiastable.com

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