Baked Sweet Onions
Transform humble onions into a showstopping side dish with this recipe for Baked Sweet Onions, featuring tender, caramelized layers infused with rich butter, aromatic garlic, and fresh thyme. Perfect for Vidalia, Walla Walla, or yellow onions, this easy oven-baked recipe combines a drizzle of olive oil and balsamic vinegar for a touch of sweetness, while a sprinkle of kosher salt and black pepper enhances their natural flavor. For an optional cheesy twist, add a dusting of grated parmesan during the final minutes of baking. With just 10 minutes of prep and an hour in the oven, these melt-in-your-mouth onions are an elegant yet simple addition to any meal, whether served alongside roasted meats, grains, or fresh salads.
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Recipe Information
Ingredients
- 4 pieces large sweet onions (Vidalia, Walla Walla, or yellow onions)
- 4 tablespoons unsalted butter
- 2 teaspoons olive oil
- 2 teaspoons balsamic vinegar
- 2 pieces garlic cloves, minced
- 1 teaspoon fresh thyme leaves
- 1 teaspoon kosher salt
- 0.5 teaspoons ground black pepper
- 2 tablespoons parmesan cheese, grated (optional)
Instructions
Preheat your oven to 375°F (190°C).
Peel the onions, trimming the tops and bottoms slightly to create a flat surface, but keeping the layers intact.
Using a small paring knife, make a shallow cross-cut from the top of each onion about halfway down the center, allowing the butter and seasonings to seep in.
Place the onions in a baking dish, spacing them evenly apart to ensure even cooking.
Drizzle 2 teaspoons of olive oil over the onions, ensuring they are lightly coated.
Add 1 tablespoon of butter to the cut center of each onion. Gently press the butter into the cross-cut to help it melt down during baking.
Sprinkle the onions evenly with kosher salt, ground black pepper, minced garlic, and fresh thyme leaves. If desired, drizzle each onion with 1/2 teaspoon of balsamic vinegar for an extra touch of sweetness and depth of flavor.
Cover the baking dish tightly with aluminum foil. This helps the onions cook through and caramelize without drying out.
Bake in the preheated oven for 45 minutes. Then, remove the foil and bake for an additional 15 minutes to allow the onions to brown slightly on top.
If desired, sprinkle grated parmesan cheese over the onions during the last 5 minutes of baking for a slightly cheesy finish.
Remove the onions from the oven and let them rest for 5 minutes before serving. Serve warm as a side dish or topping for roasted meats, grains, or salads.
Nutrition Facts
Calories |
961 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 79.2 g | 102% | |
| Saturated Fat | 34.1 g | 170% | |
| Polyunsaturated Fat | 2.7 g | ||
| Cholesterol | 132 mg | 44% | |
| Sodium | 774 mg | 34% | |
| Total Carbohydrate | 60.3 g | 22% | |
| Dietary Fiber | 8.2 g | 29% | |
| Total Sugars | 33.6 g | ||
| Protein | 10.7 g | 21% | |
| Vitamin D | 0.0 mcg | 0% | |
| Calcium | 259 mg | 20% | |
| Iron | 1.2 mg | 7% | |
| Potassium | 912 mg | 19% | |
*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
