Description
Brown Butter Onion Boil is a comforting and flavorful side dish featuring sweet onions that are boiled, filled with rich brown butter, and optionally roasted to achieve a tender, caramelized finish. Enhanced with olive oil, salt, and Parmesan cheese, this recipe perfectly balances sweetness and savory notes for an elegant yet simple preparation.
Ingredients
Scale
Onions
- 4 large sweet onions, peeled and ends trimmed
Butter Mixture
- 2 tablespoons unsalted butter (½ tablespoon per onion)
- 1 tablespoon olive oil
- ½ teaspoon salt
- 1 tablespoon Parmesan cheese
Instructions
- Preheat Oven: Preheat your oven to 375°F (190°C). This step is optional and prepares the oven for roasting the onions later to deepen their flavor.
- Prepare Onions: Scoop out the top center of each onion about one-third of the way down to create a hollow well, perfect for filling with butter and seasoning.
- Boil Onions: Place the prepared onions into a large pot of boiling water and cook for 20 minutes or until they become slightly tender yet still hold their shape. Drain well and allow them to cool slightly for easier handling.
- Fill With Butter: Spoon ½ tablespoon of unsalted butter into each onion’s hollowed center, allowing the butter to melt into the layers.
- Season Onions: In a small bowl, combine the olive oil, salt, and Parmesan cheese. Drizzle this mixture evenly over each onion to enhance flavor and add a savory finish.
- Spoon Cheese (Optional): If desired, spoon an additional amount of Parmesan cheese into each onion well for extra cheesiness and richness.
- Roast Onions (Optional): Wrap each onion individually in foil and roast for 15 to 20 minutes until the onions are fully tender. For a golden and slightly crispy top, broil wrapped onions for 2 to 3 minutes at the end of roasting.
- Serve: Unwrap the onions carefully, spoon any buttery juices collected in the foil over them, and serve warm as a delicious side dish.
Notes
- The roasting step is optional but recommended for a deeper, caramelized flavor and softer texture.
- If Parmesan cheese is unavailable, you can substitute with Pecorino Romano or omit it for a simpler version.
- Be careful not to over-boil the onions; they should remain intact and not mushy.
- Use unsalted butter to control the saltiness of the dish.
- For added flavor, sprinkle some fresh herbs like thyme or rosemary before roasting.
