German Onion Soup with Cheese Crouton Recipe
Aromatic onion soup based on stock and white wine, served with a baked cheese crouton, is a popular dish in southern Germany, especially on cold days. It’s a bit similar to the French version but usually lighter and less buttery. It works perfectly as a warming supper after a long walk or as a simple lunch with a piece of good bread.
In southern Germany, onion soup made with beef broth appears in taverns alongside beer and simple meat dishes. It is lighter than the French version because it usually doesn’t contain cream and has a drier, more “beery” character.
This version of onion soup keeps the deep sweetness of slowly cooked onions but feels a bit lighter than the classic French one. The baked cheese crouton on top turns a simple bowl of soup into a comforting, complete meal.
Why this version works
- Combining butter with oil lets you slowly cook the onions for a long time without burning or bitterness.
- Lightly drying the baguette before adding the cheese keeps the crouton from falling apart in the soup.
- Adding flour to the onions slightly thickens the broth without creating a heavy, creamy texture.
- Cooking the wine only briefly after adding it preserves fresh, dry notes instead of sharp acidity.
Chef's tips
Take your time with the onions – slow, patient cooking over medium to low heat is key to developing their sweetness without burning. If the surface of the soup gets too fatty, skim it lightly with a spoon.
How to serve
Serve the soup very hot with the cheese croutons just out of the oven so the cheese is still stretchy. A simple green salad on the side makes it a satisfying but not heavy meal.
Watch out for
- If the onions start darkening in patches or sticking, immediately lower the heat and add a spoonful of water.
- Don’t rush the caramelization – onions that are browned too hard will make the soup taste bitter.
- Don’t add cheese to a soft, untoasted baguette, because the crouton will quickly disintegrate in the soup.
Substitutions
- Replace beef stock with chicken stock if you prefer a milder-tasting soup.
- You can swap the white wine for a pale beer or extra stock with a tablespoon of lemon juice.
- Swap the yellow cheese for a mix of Gouda and Emmental or another well-melting cheese.
- Replace the baguette with ciabatta or slices of country bread, extending the toasting time.
Ingredients
- onion - 6 pieces
- butter - 40 g
- vegetable oil - 1 tablespoon
- wheat flour - 1 tablespoon
- beef stock - 1000 ml
- white wine - 100 ml
- thyme - 0.5 teaspoons
- bay leaf - 2 pieces
- baguette - 8 slices
- yellow cheese - 120 g
- salt - 1 teaspoon
- black pepper - 0.5 teaspoons
Preparation
- Peel the onions and slice them into thin wedges. The thinner they are, the faster they will soften.
- In a large pot heat the butter with the oil over medium heat. Add the onions and a pinch of salt. Fry for 20–25 minutes, stirring often, until the onions are very soft and golden but not burnt. If they start browning too quickly, reduce the heat.
- When the onions are soft and lightly golden, sprinkle with the flour and stir for about 1 minute, until the flour disappears among the onion pieces.
- Pour in the wine, stir thoroughly and cook for 2–3 minutes, until some of the liquid evaporates and the smell of alcohol is no longer intense.
- Add the stock, bay leaves and thyme. Bring to the boil, then reduce the heat and simmer gently for 15–20 minutes. Season to taste with salt and pepper.
- Meanwhile preheat the oven to 200°C (top and bottom heat). Place the baguette slices on a baking tray lined with baking paper and lightly toast for 5 minutes, until dry and slightly crisp.
- Top the toasted slices with grated cheese and return to the oven for 5–7 minutes, until the cheese has melted and is lightly browned.
- Remove the bay leaves from the soup. Ladle the hot soup into bowls, place 1–2 cheese croutons on top and serve immediately.
Storage
Store the soup (without the bread and cheese) in the fridge for up to 3 days or freeze for up to 3 months. Prepare fresh baguette slices with cheese just before serving reheated soup so they stay crisp.
For me this soup is the taste of cold evenings in the mountains – simple ingredients, long simmering and a big bowl that warms you from the inside. It’s also a great way to use up leftover bread.
