Save A sweet, tender Vidalia onion roasted whole until meltingly soft, with aromatic herbs and butter. This is a simple yet elegant side dish that transforms humble onions into something truly special.
I first made Onion Boil on a whim for a family dinner, and its buttery aroma filled the kitchen, making everyone eager for just a taste. Since then, it's been a favorite for gatherings when I need something quick yet comforting.
Ingredients
- Vidalia onions: 4 large, unpeeled (or other sweet onions)
- Unsalted butter: 4 tbsp
- Fresh thyme: 4 sprigs
- Garlic: 4 cloves, peeled
- Kosher salt: 1 tsp
- Freshly ground black pepper: ½ tsp
- Optional garnish - Fresh parsley: 2 tbsp chopped
Instructions
- Preheat Oven:
- Set your oven to 400°F (200°C).
- Trim and Prepare Onions:
- Trim just the root ends and tops so onions sit flat, leaving skins on.
- Score Tops:
- Use a paring knife to cut a shallow X into the top of each onion.
- Season:
- Place onions on heavy-duty foil and sprinkle with salt and pepper.
- Add Aromatics:
- Press 1 tbsp butter, 1 thyme sprig, and 1 garlic clove into each onion's top.
- Wrap and Bake:
- Wrap onions tightly in foil, set on a baking sheet, and roast for 1 hour 10 minutes.
- Finish and Serve:
- Carefully unwrap, remove skins, transfer to plates, spoon over melted butter, and sprinkle with parsley if desired.
Save This recipe was a hit at our last Sunday lunch, with every family member returning for seconds and asking for the secret behind its irresistible taste.
Serving Suggestions
Onion Boil pairs beautifully with roast meats, grilled vegetables, or can be enjoyed as a standout vegetarian main along with crusty bread.
Substitutions & Variations
You can swap Vidalia onions with Walla Walla or Maui onions for different flavors, and add balsamic vinegar or smoked paprika for a new twist.
Allergy & Dietary Notes
Contains dairy due to butter. For dairy-free, swap with vegan butter or olive oil and always verify packaged ingredients for hidden allergens.
Save Lightly sprinkle fresh parsley on top for a burst of color and flavor. Enjoy warm, straight from the oven for best texture.
Kitchen Guide
- → What type of onions work best for roasting?
Sweet onions like Vidalia, Walla Walla, or Maui are ideal due to their natural sweetness and tenderness when cooked.
- → How do you ensure the onions cook evenly?
Wrapping each onion tightly in foil helps retain moisture and promotes even cooking during roasting.
- → Can I add other herbs or spices?
Yes, herbs like thyme are classic, but additions like smoked paprika or a splash of balsamic vinegar can enhance flavor.
- → Is it necessary to remove the onion skins after roasting?
Yes, peeling the skins after cooking reveals the tender, sweet interior ready to serve.
- → What dishes pair well with roasted Vidalia onions?
They complement roast meats, grilled vegetables, or can be served as a flavorful vegetarian side with bread.