Roasted onion soup with goat's cheese toasts

Roasted onion soup with goat's cheese toasts

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(18 ratings)

Prep: 25 mins Cook: 1 hr


Serves 4

Roasting the onions gives the soup a rich caramelised flavour that really hits the spot on a chilly day

Nutrition and extra info

  • Can be frozen without the toast
  • Vegetarian

Nutrition: per serving

  • kcal454
  • fat18g
  • saturates5g
  • carbs62g
  • sugars16g
  • fibre6g
  • protein15g
  • salt2.33g
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  • 800g yellow or white onions, sliced



    Onions are endlessly versatile and an essential ingredient in countless recipes. Native to Asia…

  • 4 tbsp olive oil
    olive oil

    Olive oil

    ol-iv oyl

    Probably the most widely-used oil in cooking, olive oil is pressed from fresh olives. It's…

  • 1l vegetable stock
  • 1 tbsp wholegrain mustard
  • 1 tsp Marmite
  • handful parsley, roughly chopped



    One of the most ubiquitous herbs in British cookery, parsley is also popular in European and…

  • 8 thick slices bread
  • 100g soft vegetarian goat's cheese, cubed


  1. Heat oven to 200C/180C fan/gas 6. Put the onions in a roasting tin with the oil, salt and pepper. Give it a good stir, then roast for 45 mins, stirring halfway through, until the onions are tinged brown, but not burnt.

  2. Tip the onions into a large pan with the stock, mustard and Marmite. Bring to the boil and simmer for 15 mins, then stir in the parsley. Toast 4 of the bread slices then scatter on the cheese. Ladle the soup into bowls, pop a toast into each and serve with the extra slices of bread on the side.

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Comments, questions and tips

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18th Feb, 2019
This is a really easy way to make onion soup and it is delicious. We had vegetarian and vegan diets so just left out the goats cheese for the vegan version.
13th Mar, 2016
What did I do wrong I wonder, I really did not like it at all, very strong taste of mustard, will not make again.
28th Oct, 2015
Didn't use marmite or soy sauce (as prev comments) as the colour was dark enough from roasting. Did add small sprinkle of sugar and balsamic to roasting & blitzed it just a little at the end- and I can now say I have a new favourite soup. really easy to make, really tasty
6th Aug, 2015
I hate Marmite, but I absolutely loved this soup. It's incredible to think that such few ingredients can make something so lovely. I added a bit of thyme during the simmering stage.
16th Jun, 2015
Excellent soup! Uses lots of onions, be warned! It is the best onion soup I've made. Like suggested, I added some balsamic vinegar and sugar to the onions. I then added some more balsamic vinegar when the soup was cooking for added flavor. Will be making this a lot more often, so easy!
31st Mar, 2014
I love making soups; easy, healthy, tasty, economical food, so this is a welcome addition to my soup list. I followed other reviewers' advice and added a little sugar and balsamic to the onions when roasting (the smell of roasting onions was scrumptious) and blitzed the finished soup a little bit to improve texture and appearance. It went down well with my family and visitors. Whilst the recipe is very easy, it does require quite a while in the oven so I did prep the onions while using the oven anyway to avoid wasting time and fuel. I didn't do the goat's cheese toasts as was serving as a starter and thought may be a bit heavy. Will do when serving as lunch though.
4th Oct, 2013
Nice recipe, omitted the marmite and added a dash of soy sauce for colour - nice with garlic bread and would be great for a cold day!
13th Mar, 2013
After reading all the comments I also added balsamic vinegar and brown sugar to the onions whilst they were roasting. I blitzed the soup with a hand blender and added goats cheese to the soup itself, then served the soup with crusty bread. It went down a treat, great soup for a cold day
13th Jan, 2013
A wonderful flavoured soup. It went down a treat as a starter last night. i didn't do the goats cheese toasts, but served it with homemade Guinness soda bread. So easy to make to0.
20th Oct, 2012
Made this today - used 2 tablespoons of balsamic vinegar and 1 tablespoon of sugar when roasting, used 1 dessertspoon of worcestershire sauce instead of marmite (as if bought the rest of the marmite would not be used) semi blitzed it - only sorry I didnt make double as it only lasted 20mins. easy to make - really economical - loads of flavour - great winter soup


7th Sep, 2015
Hello Are you meant to chop the onions before roasting or blend them at the end?
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