Go Back

Butter Roasted Onions

Butter Roasted Onions are a comforting and flavorful side dish that elevates the natural sweetness of onions with rich butter, perfect for weeknight dinners or special occasions.
Print Recipe Pin Recipe
Prep Time 10 minutes
Cook Time 45 minutes
Total Time 55 minutes
Servings: 6 servings
Course: Side Dish
Cuisine: American
Calories: 180
Ingredients Method Notes

Ingredients
  

Main Ingredients
  • 6 medium onions (yellow or sweet) peeled, root end trimmed but left intact
  • 4 tablespoons unsalted butter room temperature for even melting
  • 1 tablespoon olive oil prevents sticking
  • 1 teaspoon kosher salt enhances natural sweetness
  • 1/2 teaspoon freshly ground black pepper balances the sweetness
  • 1 tablespoon fresh thyme leaves or 1 teaspoon dried thyme
  • 2 cloves garlic thinly sliced, optional
  • 1 tablespoon balsamic vinegar or honey optional finish for flavor

Method
 

Preparation
  1. Preheat your oven to 400°F (200°C). Line a baking dish with parchment for easy cleanup.
  2. Trim the tops and root ends of the onions, peel them, and place them in the dish standing upright.
  3. In a small bowl, mash together the butter and olive oil with salt, pepper, thyme, and sliced garlic if using.
  4. Spoon a little of the butter mixture into the center of each onion and spread gently over the outside.
Cooking
  1. Roast uncovered for 25 minutes, then turn the onions gently so they brown evenly.
  2. Roast another 10–20 minutes until a skewer slides through easily and the exterior is deeply golden.
  3. Finish with a drizzle of balsamic vinegar or a light brush of honey and sprinkle with additional thyme.

Notes

Make it festive with pomegranate seeds and toasted hazelnuts, smoky with paprika, or serve with greens for a nutritious finish. Store refrigerated for up to 4 days or freeze for up to 2 months.