Description
A rich and flavorful caramelized onion sauce preparation featuring boiled sweet onions enhanced with butter, olive oil, and seasoning, optionally finished by roasting for a tender and golden top. Perfect as a side or topping to elevate any dish with its deep, savory sweetness.
Ingredients
Scale
Onions
- 4 large sweet onions, peeled and ends trimmed
Butter and Oil
- 2 tablespoons unsalted butter (½ tablespoon per onion)
- 1 tablespoon olive oil
Seasoning
- ½ teaspoon salt
- 1 tablespoon seasoning sauce or cheese (such as soy sauce, Worcestershire sauce, or grated Parmesan) – adjust according to preference
Instructions
- Preheat Oven (Optional): Preheat your oven to 375°F (190°C) if you choose to roast the onions for extra flavor and tenderness.
- Prepare Onions: Using a scoop or spoon, hollow out the top center of each onion about one-third of the way down to create a well for filling.
- Boil Onions: Bring a large pot of water to a boil. Add the onions and cook for 20 minutes until they are slightly tender but still firm. Drain the onions and let them cool slightly.
- Add Butter: Place ½ tablespoon of unsalted butter into the well of each onion to start infusing them with richness.
- Mix and Drizzle Seasoning: In a small bowl, combine olive oil, salt, and your selected seasoning or sauce. Drizzle this mixture over the onions, allowing it to seep between the layers for deep flavor penetration.
- Fill Onion Wells (Optional): Spoon additional seasoning sauce or grated cheese into each onion well as a flavorful filling enhancement.
- Roast and Broil (Optional): Wrap each prepared onion in foil and place them in the oven to roast for 15 to 20 minutes until tender. For a golden and slightly crisp top, remove the foil and broil for 2 to 3 minutes.
- Serve: Plate the onions alongside any buttery juices that collected during roasting for maximum flavor enjoyment.
Notes
- Adjust the seasoning or cheese according to your taste and dietary preferences; Parmesan adds a savory, cheesy element, while soy or Worcestershire sauce adds umami depth.
- The roasting step is optional but recommended for enhanced flavor and texture.
- Boiling the onions first softens them yet keeps the shape intact for stuffing and roasting.
- Use sweet onions like Vidalia or Walla Walla for best flavor balance.
- Serve warm as a side dish or as a complement to grilled meats or roasted vegetables.
