Baked onions are a super simple side dish but gourmet enough to serve at a dinner party.

The flavor of this side dish is reminiscent of French Onion Soup. And the presentation can’t be beat. Our instructions are for one onion, but you can easily bake up to six onions on the same baking sheet for an impressive dinner party spread.
What kind of onions are best for baking?
Sweet onions are the best kind to bake and use as a side dish. They have a milder somewhat sweet flavor that only gets sweeter with baking. Red onions are another great option.
How do you prepare an onion for baking whole?
You’re in luck! We’re showing you step by step exactly how to properly prepare an onion for baking. You’ll bake it with seasonings so once it comes out of the oven it’s perfectly cooked and seasoned to enjoy immediately. So gather your knife, cutting board, and onions and let’s get cooking!
Step #1
First, preheat your oven to 350°F. Peel your onion, leaving the root intact. If your onion sits level, you can leave it alone. If not, cut a thin slice off the root to create a flat bottom.

Step #2
Use a paring knife to cut a 1-inch deep cone into the top of the onion.

Step #3
Insert a vegetable, chicken, or beef bouillon cube into the hole.

Step #4
Fill the rest of the hole with butter, about 1-2 tablespoons. Season with salt and pepper.

Step #5
We’re going to bake the whole onion in foil so place the filled onion on a sheet of foil large enough to encase it. Wrap the onion in foil, bringing the edges up in the center.

Step #6
Twist the foil together to seal the onion in. Place the foil-wrapped onion on a baking sheet.

Step #7
Bake for 45-60 minutes, until the onion is tender. Serve warm.
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Baked Onion
Baked onions are such a simple side dish but gourmet enough to serve at a dinner party.
- Prep Time: 5 minutes
- Cook Time: 45 minutes
- Total Time: 50 minutes
- Yield: 1 serving 1x
Ingredients
- 1 medium onion
- 1 vegetable, chicken or beef bouillon cube
- 1–2 Tbsp. butter
Instructions
- Preheat the oven to 350°F.
- Peel the onion, leaving the root intact. If the onion sits level, it’s ready to use. If not, cut a thin slice off the root to create a flat bottom.
- Use a paring knife to cut a 1 inch deep cone into the top of the onion.
- Insert a vegetable, chicken, or beef bouillon cube into the hole.
- Fill the rest of the hole with butter, about 1-2 tablespoons. Season with salt and pepper.
- Place the filled onion on a sheet of foil large enough to encase it.
- Wrap the onion in foil, bringing the edges up in the center. Twist the foil together to seal the onion in. Place the foil-wrapped onion on a baking sheet.
- Bake for 45-60 minutes, until the onion is tender. Serve warm.

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