National Dish Austria: Onion Soup with Cheese Croutons (Recipe)
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There is little that beats a steaming bowl of onion soup with cheese croutons when the weather turns cold. This Austrian favourite brings together slowly caramelised onions, a deeply savoury broth and crisp slices of baguette blanketed in bubbling, golden cheese. It is the very definition of comfort food: warming, hearty and wonderfully simple to make. Once you have tasted that first cheesy, golden spoonful, it is sure to become a fixture on your winter table.
About Onion Soup with Cheese Croutons
Onion soup with cheese croutons is not only a much-loved national dish in Austria but also a true comfort food, especially prized during the colder months. The soup offers a perfect balance of caramelised onions, an aromatic broth and crunchy, cheese-topped croutons. Together these elements deliver an incomparable taste experience that pampers the palate and brings a real sense of cosiness. If you love putting together a classic dish like this, then this recipe is exactly what you are looking for.
Ingredients (serves 1–2)
- 2 large onions
- 1 litre vegetable or beef stock
- 2 tablespoons butter
- 1 teaspoon sugar
- 1 teaspoon thyme
- Salt and pepper, to taste
- 2 slices of baguette
- 100 g grated cheese (such as Emmental or Gruyère)
Shopping for the ingredients
When shopping for the ingredients for onion soup with cheese croutons, it pays to pick fresh onions and a good-quality stock. Make sure the onions are firm and free of soft spots so you get the very best flavour. The cheese is just as important; choose one that melts well and brings a pleasant savoury note. Take care over these choices and you will end up with an even better result, turning the meal into a real treat.
Preparing the dish
Before you begin cooking the soup, it is worth preparing all of your ingredients. Slice the onions into fine rings so they caramelise more quickly. Have you already pre-cooked the stock, or at least got it ready to go? That saves time during cooking and helps everything run smoothly. It is also a good idea to have a pan to hand for toasting the croutons later on.
Step-by-step instructions
- Melt the butter in a large pan over medium heat.
- Add the sliced onions and sweat them gently, stirring, for around 10 minutes until soft.
- Stir in the sugar and thyme, then turn up the heat and let the onions caramelise for a further 5–10 minutes.
- Pour in the stock, bring everything to the boil, then reduce the heat and simmer for 15 minutes.
- Meanwhile, toast the slices of baguette and scatter them with grated cheese.
- Ladle the finished soup into bowls and top with the cheese croutons.
- Bake in a preheated oven at 200°C for about 5–7 minutes, until the cheese has melted beautifully.
Gluten-free / lactose-free version
For a gluten-free version of the onion soup, simply use gluten-free bread for the croutons. Just make sure the stock is gluten-free too. For a lactose-free preparation, the cheese can easily be swapped for plant-based cheese alternatives made for dishes like this. Such alternatives are now widely available in many supermarkets and taste excellent.
Tips for vegans and vegetarians
A vegan version of the onion soup is easy to put together: simply use vegetable stock and leave out the cheese croutons. Instead, you can reach for a vegan cheese or scatter the croutons with a mixture of blitzed nuts or nutritional yeast to keep that savoury depth. Be sure to replace any unsuitable fats with plant-based ones such as olive oil. With that, nothing stands between you and a delicious, wholesome bowlful.
More tips and tricks
One key tip for making onion soup is to be patient when caramelising the onions. The longer they cook over a low heat, the more intense the flavour becomes. For extra depth, you can also add a splash of white wine to the stock before stirring it into the soup. Keep an eye on the heat once the stock goes in, so the soup does not boil too fiercely. This preserves the aromas and makes the onion soup all the more flavoursome.
Adapting the recipe to your taste
The onion soup is a very versatile dish and easy to tailor to your own preferences. You could, for example, add different herbs or spices such as rosemary or bay leaves to vary the flavour. The vegetables can be changed up too: add carrots or celery to develop extra layers of aroma. Be creative and try out different versions, so that every pot of soup turns out a little bit unique.
Ingredient substitutions
If you do not have your usual onions to hand, red or brown onions work just as well, as they bring a similar flavour. Instead of butter you can use plant-based oils or margarine. When it comes to the stock, you can choose between a homemade version and a ready-made one – the same goes for your choice of cheese. Feel free to experiment here to find the alternatives that suit your palate best, much as you might when making a comforting Rahmsuppe.
Drink pairing ideas
A number of drinks pair very nicely with onion soup with cheese croutons. A dry white wine, such as a Sauvignon Blanc, harmonises perfectly with the flavours of the soup. For an alcohol-free option, a lively apple juice or an alcohol-free beer fits the bill. A heart-warming tea also works well alongside this dish, particularly on cold winter evenings.
Serving and presentation ideas
Presentation plays a big part in heightening the enjoyment of your soup. Serve it in deep white bowls or charming soup cups, so the colours come to life. Garnish the soup just before serving with fresh parsley or thyme for extra colour and freshness. Take care to bake the cheese croutons to a lovely golden brown to make them all the more appealing to the eye.
A bit of history
Onion soup has its origins in French cuisine, but it quickly made its way into Austrian cooking, where it became very popular. Traditionally it was prepared as a simple meal for poorer families, cooked from just a few ingredients. Today it is a beloved dish in many restaurants and kitchens around the world. The combination of onions, broth and cheese croutons has proven timeless and remains a steady favourite, much like the heartiest classics of Austrian cuisine.
More recipe ideas
Summary: Onion Soup with Cheese Croutons
Onion soup with cheese croutons is an aromatic, nourishing dish that wins everyone over with its clear, hearty flavours. Whether served as a main course or as a starter, the combination of onions, broth and cheese delivers pure satisfaction. Thanks to its simple preparation and the freedom to adapt the recipe to your own tastes, it is perfect for any occasion. So gather your ingredients and enjoy the warming flavour of Austrian cooking.
