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Balsamic Roasted Onions

Balsamic Roasted Onions

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Savor the simplicity of Balsamic Roasted Onions, featuring sweet onions, balsamic vinegar, and a hint of white wine, perfectly seasoned and roasted to perfection. Ideal as a flavorful side dish or a charming addition to your antipasti spread.

Ah, Balsamic Roasted Onions, a recipe that takes me back to my grandmother’s cozy kitchen. It was a Sunday ritual, her moving gracefully around, humming tunes while the onions sizzled softly in the oven. I remember being fascinated by how she transformed humble onions into something so aromatic and flavorful. She’d always say, “Cooking is like painting, but instead of colors, we use flavors.” Each onion, carefully chosen for its sweetness, was paired with her special balsamic vinegar, a treasured bottle she only used on special occasions. As they roasted, their scent would fill the house, a reminder of the simple joys in life. When served, these onions were not just a dish but a memory on a plate, each bite taking me back to those lazy Sundays, filled with love, laughter, and the magic of my grandmother’s cooking.

Why You’ll Love Balsamic Roasted Onions

The charm of this Balsamic Roasted Onions recipe lies in its delightful simplicity and depth of flavor. It transforms everyday onions into a gourmet experience, making it an ideal dish for both casual family dinners and upscale gatherings. The combination of sweet onions with the rich, tangy balsamic vinegar creates a beautiful balance of flavors. Furthermore, the addition of a splash of dry white wine adds a sophisticated note, elevating the dish beyond the ordinary. It’s also incredibly versatile, serving as a delicious side dish or a star player in an antipasti platter. The ease of preparation is another huge plus, making it accessible for cooks of all skill levels.

Ingredients Notes For Balsamic Roasted Onions

Each ingredient in this Balsamic Roasted Onions recipe plays a pivotal role in creating a harmonious blend of flavors and textures. Let’s break down these key players:

  • Butter and Olive Oil: The duo of butter and olive oil provides a rich base, with butter adding creaminess and olive oil bringing its distinct, fruity notes.
  • Sweet Onions: Opt for small or medium-sized for their natural sweetness and perfect caramelization.
  • Balsamic Vinegar: The star ingredient, balsamic vinegar, imparts a deep, slightly sweet, and tangy flavor. Quality matters here, so choose a good balsamic vinegar for the best results.
  • Dry White Wine: A touch of dry white wine enhances the overall flavor profile with its crisp and acidic nature, adding a layer of complexity.
  • Sugar: Just a hint of sugar balances the acidity of the vinegar and wine.
  • Salt & Pepper: Essential for seasoning and bringing out the natural flavors of the onions.
  • Fresh Green Herb: Whether it’s parsley, thyme, or oregano, a fresh herb adds a burst of color and freshness, complementing the roasted onions beautifully.

Step-by-Step Instructions

Let’s dive into the process of making these heavenly Balsamic Roasted Onions. With each step detailed for clarity, even the most novice of cooks can master this dish.

  • Step 1: Kick things off by preheating your oven to 425 degrees F. This high temperature is crucial for achieving that perfect roast.
  • Step 2: Peel and halve the onions. This method exposes more surface area, allowing the onions to absorb the flavors fully.
  • Step 3: In an ovenproof casserole, blend the butter and olive oil. This mixture will not only prevent sticking but also add richness to the onions.
  • Step 4: Whisk in the balsamic vinegar, white wine, sugar, salt, and pepper. This step creates a flavorful bath that will coat and caramelize the onions during roasting.
  • Step 5: Arrange the onions cut side down in the dish. This position ensures even cooking and caramelization.
  • Step 6: Cover the dish with foil and bake for 20 minutes. The foil helps in steaming the onions, making them tender.
  • Step 7: Flip the onions and baste them with the pan juices. This action helps in developing a deep flavor and color.
  • Step 8: Uncover and continue baking for 20-25 minutes. This final roast gives the onions a beautiful golden-brown finish.
  • Step 9: Once done, serve the onions warm or at room temperature, garnished with your chosen herb. This not only adds a fresh flavor but also an appealing visual element.

Storage Options:

Balsamic Roasted Onions store beautifully, making them a fantastic make-ahead dish. Once cooled, place them in an airtight container and refrigerate for up to 4 days. For longer storage, these onions can be frozen. Place them in a freezer-safe container or bag, and they will keep well for about 2 months. When you’re ready to enjoy them again, simply thaw in the refrigerator overnight and reheat gently to preserve their texture and flavor. This reheating can be done in a microwave or in an oven until they are just warm, ensuring they retain their succulent texture and rich flavor.

Variations and Substitutions:

This Balsamic Roasted Onions recipe is wonderfully adaptable, allowing for various tweaks and substitutions to suit different tastes and dietary needs.

  • For a Vegan Version: Replace the butter with a vegan alternative or simply use more olive oil.
  • Different Onions: While sweet onions are recommended, feel free to experiment with red onions or shallots for a different flavor profile.
  • Balsamic Glaze: For a more intense flavor, use a balsamic glaze instead of regular balsamic vinegar.
  • Herb Varieties: Don’t limit yourself to parsley, thyme, or oregano. Experiment with basil, rosemary, or even a mix of your favorite herbs.
  • Alcohol-Free: If you prefer to avoid wine, substitute it with a little bit of apple cider vinegar or more balsamic vinegar mixed with a splash of water.
  • Added Sweetness: For a sweeter dish, increase the amount of sugar or drizzle with honey before serving.
  • Spice It Up: For those who enjoy a bit of heat, add a pinch of red pepper flakes to the vinegar mixture.

Embrace the spirit of culinary creativity and make this Balsamic Roasted Onions recipe uniquely yours! 🌟🧅🍽️

Balsamic Roasted Onions

Savor the simplicity of Balsamic Roasted Onions, featuring sweet onions, balsamic vinegar, and a hint of white wine, perfectly seasoned and roasted to perfection. Ideal as a flavorful side dish or a charming addition to your antipasti spread.
2 from 1 vote
Print Pin Rate
Course: Side Dish
Cuisine: American
Prep Time: 10 minutes
Cook Time: 45 minutes
Total Time: 55 minutes
Servings: 6


  • 2 Tablespoons of Butter
  • 1 Tablespoon of Olive Oil
  • 6 Small or 4 Medium Sweet Onions
  • 1/3 Cup of Balsamic Vinegar
  • 2 Tablespoons of Dry White Wine
  • 1 Tablespoon of Sugar
  • Salt and Pepper to taste
  • 2 Tablespoons of Chopped Fresh Green Herbs Parsley, Thyme, or Oregano


  • Begin by preheating your oven to a temperature of 425 degrees Fahrenheit.
  • Proceed to peel the onions. Once peeled, slice them crossways into halves.
  • In an ovenproof casserole dish, large enough to accommodate all of the onion halves, combine the olive oil and butter.
  • To the oil and butter mixture, whisk in the balsamic vinegar, dry white wine, a dash of salt, a sprinkle of sugar, and a pinch of pepper to taste.
  • Arrange the onion halves in the dish, ensuring they are placed cut side down, in a single layer.
  • Cover the dish loosely with aluminum foil and bake in the preheated oven for a duration of 20 minutes.
  • After 20 minutes, remove the dish from the oven. Turn each onion half over and brush them with the pan juices to ensure they are well-coated.
  • Return the dish to the oven, uncovered this time, and continue to bake for an additional 20 to 25 minutes. The onions should be tender and have a browned appearance when done.
  • Once baking is complete, remove the onions from the oven. They can be served either warm or at room temperature, garnished with the freshly chopped green herbs of your choice.
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