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Whole Roasted Onions Recipe – delicious buttery whole roasted onions baked to perfection – perfect as a side dish!
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At Sweet C’s, I add lots of tips in all of my recipes – because I am a home cook without any formal training, and I find I am more confident making dishes when I understand why it works, and what each ingredient means to the flavor of a recipe – my goal is for even the most beginner home cook to feel empowered in the kitchen.
I want each reader to walk away with a solid knowledge of each recipe, with all of the tips I’ve gathered from extensive testing of each recipe. I also answer questions my friends and family have asked about my recipes, to help everyone better understand the processes we use – and why!
Table of contents
Buttery Whole Onions
This is the perfect gorgeous – but crazy easy – side dish for a holiday dinner or even Sunday supper – and it makes the whole house smell amazing.
These onions roast to soft, buttery perfection with just a couple herbs and spices – and are fabulous paired with pork tenderloin, steaks, turkey, chicken thighs, or any hearty main dish you love!
We hope you love this recipe as much as we do!
How To Roast Whole Onions
Roasting onions is so easy, you’re going to want to make these decadent, buttery onions for every meal!
If you can use a knife and sprinkle some herbs, you can make this side dish!
The process is relatively straightforward, following these steps:
- Cut off the top and bottoms to onions
- Season generously with salt and pepper
- Top with butter and herbs
- Bake
Tips and Tricks to Perfect Whole Roasted Onions
Baked onions are done when they are browned and very soft, which can take anywhere from 60-100 minutes.
Don’t rush your onions – make them ahead of time and reheat if you’re worried about timing for an event, as the flavor really can’t be rushed for this recipe.
Recipe FAQs
Baked onions are done when they are browned and very soft, which can take anywhere from 60-100 minutes.
Don’t rush your onions – make them ahead of time and reheat if you’re worried about timing for an event, as the flavor really can’t be rushed for this recipe.
We roast onion in the skin for the best flavor – simply discard when serving.
This recipe isn’t expressly vegan, as we’re using butter.
Swap the butter for equal amounts of olive oil drizzled over the onions to make it vegan!
This recipe can be stored in the refrigerator in an airtight container for up to five days.
Other Easy Side Dishes You’ll Love
If you’re looking for other dishes to pair alongside a pork tenderloin, London broil, turkey breast, lobster tails, or even cauliflower steaks – please check out some of our favorite side dishes below:
You can find our entire side dish recipe index here.
Whole Roasted Onions Recipe
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Whole Roasted Onions Recipe
Equipment
Ingredients
- 6 yellow onions
- 6 tablespoons butter, cut into 6 pats for each onion (use olive oil for vegan)
- 1 tsp italian herb seasonings
- 2-3 sprigs fresh rosemary or thyme
- salt and pepper, to taste
Instructions
- Preheat oven to 350 degrees.
- Cut the top and bottom off onion to make a flat surface, leaving peel on.
- Place into baking dish, either lined with foil or prepped with nonstick cooking spray.
- Sprinkle with salt, pepper, and herbs.
- Top with a pat of butter.
- Bake 60-90 minutes at 350 degrees, until onions are browned, very soft, and fragrant.
- When serving, remove peel.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
I’ve been doing this for years, great to see someone put it in recipe form for folks.
As an addition you can pour a warm cheese sauce around the onions or bake it with them at the last half of backing. sprinkle with smoked paprika, serve with hot sauce of choice.
Warm cheese sauce sounds amazing!