Balsamic Roast Onion Soup is a delightful earthy soup that is rich and creamy yet still virtuously light on the digestive system.
Serve with a great big chunk of fresh bread topped with a great big dollop of butter just to balance things up a bit.
Balsamic Roast Onion Soup

Superfood Soups – Balsamic Roast Onion
Prep Time
15 mins
Cook Time
1 hr 30 mins
Total Time
1 hr 45 mins
Course: Soup
Cuisine: British
Keyword: Balsamic Roast Onion Soup
Servings: 4
Calories: 101 kcal
Ingredients
- 700 g onions quartered
- 850 ml water water & stock cube or stock
- 1 medium potato peeled & diced
- 1 splash Balsamic vinegar
- Oil dripping or butter
- ½ teaspoon salt
Instructions
- Peel & chop onions into quarters. Pop in a roasting tin and brush with the melted butter or oil, then splash with the Balsamic vinegar. I probably used a couple of tablespoons of it over the onions (don't worry if you haven't cooked with this stuff before, your soup won't taste vinegary - I promise!)
- Roast gently, at about Gas 2/150c/300f for an hour to an hour & a half.
- The onions want to be juicy & browned, but not burnt. Cover with foil halfway through if they are looking too well done.
- Meanwhile, cook the chopped potato in the water or stock, keeping a lid on to prevent the stock steaming off.
- When the potato is soft and the onions are juicy, mix together in the saucepan & blitz with a stick blender, or let cool a little and tip into a jug blender. Whizz till fine and smooth.
- Season with the salt, and a pinch of chilli powder wouldn't hurt if you needed extra warming up.
Nutrition Facts
Superfood Soups – Balsamic Roast Onion
Amount Per Serving
Calories 101
% Daily Value*
Fat 0g0%
Saturated Fat 0g0%
Cholesterol 0mg0%
Sodium 313mg14%
Potassium 475mg14%
Carbohydrates 23g8%
Fiber 4g17%
Sugar 7g8%
Protein 3g6%
Vitamin C 19.1mg23%
Calcium 63mg6%
Iron 2.1mg12%
* Percent Daily Values are based on a 2000 calorie diet.
Shared with; Wildcrafting Wednesday, Homestead Barn Hop
Nikki says
Mmmmmmmm lovely x
Jane Sarchet says
There’s lots left Nikki, see you in an hour or two? :)
Tammy/Our Neck of the Woods says
Ooooh delicious! My kind of soup for sure. Roasting veggies makes them so much more wonderful!
Jane Sarchet says
I know right, it makes them super sweet xx
Kathy @ Mind Body and Sole says
Yum! Thanks for sharing on Wildcrafting Wednesday! :)
Jane Sarchet says
Thanks Kathy, and thanks for taking the time to visit!
Janie x
[email protected] says
This sounds really good…especially since I love onions! Thanks for the recipe…will be pinning this! :)
Jane Sarchet says
Thanks for the pin Nancy, hope you love it!
Janie x
Carol says
Sounds delicious! Onion soup is helpful for fighting colds. I will try this.
Jane Sarchet says
Hi Carol, I hope you love it as much as we do!
Thanks for stopping by
Janie x
Hamilton Courtney says
Onion soup! And a really excellent recipe for it.
Always room in my bookmarks for an onion soup :)
Happy new year!
narf7 says
Why oh WHY do I go trawling for recipes when I am on a green smoothie week? This made me salivate to the max especially when I saw the “great big chunk of fresh bread” suggestion…no bread for me for a few more days but this soup is calling me. Cheers for sharing :)
Jane Sarchet says
Really? A whole week of nothing but smoothies?
Good luck!
Tina´s PicStory says
sound good :)
Jane Sarchet says
Thank Tina!
Janie x