Oven Baked Onions

by Editorial Staff

Lettuce onions are baked in the oven with balsamic vinegar until they are golden brown.

Summary

Prep Time	10 mins
Cook Time	55 mins
Total Time	65 mins
Course	Baking
Servings (Default: 4)

Ingredients

Salad onions – 4 pcs. (about 600 g)
Balsamic vinegar – 0.3333 cup
Butter (melted) – 2 tbsp
Olive oil – 1 tbsp
Dry white wine/chicken broth – 2 tbsp
Sugar – 1 tbsp
Ground black pepper – 0.125 teaspoon.
Fresh thyme (leaves only) (optional)

Instructions

Turn on the oven to preheat to 215 degrees. Pour olive and butter into a 3-liter ovenproof dish, grease the bottom and sides of the mold with this mixture. In a separate bowl, mix the vinegar, wine, sugar, salt, and pepper, pour into an oiled dish.
Peel the onion, but do not cut off the ends. Cut the onions in half lengthwise, put the halves in the prepared form with the slices up, cover the form with foil, place in the oven for 30 minutes.
Remove the foil, turn the bulbs to the other side, cut them down, and place them in the oven again, cook, uncovered, for 20-25 minutes.
When serving, sprinkle with thyme.

About Editorial Staff

The Boss Kitchen editorial staff oversees content review, fact-checking, and recipe verification across the site. Published articles pass through the editorial team before going live, ensuring ingredient lists, techniques, cooking times, and nutritional claims hold up in a home kitchen. The team coordinates contributions across the site writers, handles reader corrections, and maintains consistency in measurement conventions, safety guidance, and dietary labeling. Posts under this byline typically represent team-reviewed reference material, site announcements, or editorial roundups rather than individual-author features, and they are held to the same sourcing standards as bylined recipe and product coverage.