I love this cozy luxurious French Onion Soup.
Slow-cooked caramelized onions, simmered with rich beef stock and topped with melted-Gruyere-toast croutons.
The onions mellow and gain a rich sweetness as they cook down – adding so much flavour to this glorious soup.
INSTRUCTIONS
- Add the butter and oil to a large Dutch oven or heavy-based saucepan. Heat over a medium-to-low heat.
90 g (6tbsp) unsalted butter, 1 tbsp oil
- When the butter has just melted, add the sliced onions, salt and pepper.
6 medium yellow/brown onions, ½ tsp salt, 1 tsp black pepper
- Cook, uncovered, for about 45-50 minutes, stirring occasionally at first, then often in the last 15-20 minutes (to stop the onions ‘catching’ on the bottom of the pan), until the onions are golden brown and caramelised. Be sure to keep a close eye on the onions, especially in the last 20 minutes, as you don’t want them to burn at all. Turn down the heat a little if you’re worried they’ll burn.
- Add the garlic and cook for one minute, whilst stirring.
3 cloves minced garlic
- Add the wine to ‘deglaze’ the pan and pick up all of those flavourful bits. Turn up the heat to medium-high and cook for about 5-8 minutes, stirring often until almost all of the liquid has evaporated and you can no longer smell the wine.
180 ml (¾ cup) white wine
- Turn the heat back down to medium and stir in the flour. Cook for one minute, stirring constantly.
2 tbsp plain (all-purpose) flour
- Add the stock and Worcestershire sauce. Stir together, turn up the heat and bring to the boil.
1.5 litres (a splash over 6 cups) good quality strong beef stock, 1 tbsp Worcestershire sauce
- Turn the heat down to a simmer, stir again and place a lid on the pan. Simmer for 30 minutes. After 30 minutes, taste and add a little more slat if required (this wil depend on the saltiness of your stock).
- When the soup is nearly ready, start on the cheese baguette slices/croutons.
Method 1 – Melting the cheese directly in the bowls
- Once the soup is ready, ladle out into grill(broiler)-safe bowls.
- Top each bowl with two of the baguette slices. Divide the grated Gruyere between the bowls, sprinkling it all over the soup and bread.
1 small baguette sliced into 2cm (¾ inch) slices, 100 g (1 packed cup) grated Gruyere cheese
- Place the bowls on a tray under the grill (broiler) and slide under the heat.
- Grill for 2-4 minutes, until the cheese is melted and bubbling.
- Carefully remove the bowls (they’ll be VERY hot) and serve sprinkled with fresh thyme leaves.
fresh thyme leaves for garnish
Method 2 – Melting cheese on the crouton separately
- Toast the baguette slices on both sides under the grill (broiler) until lightly browned.
1 small baguette sliced into 2cm (¾ inch) slices
- Once the baguette slices have been lightly browned under the grill (broiler), sprinkle them with the Gruyere and place back under the grill.
100 g (1 packed cup) grated Gruyere cheese
- Toast until the cheese is melted and bubbling.
- Ladle the soup out into bowls and place two slices of the cheese toasts on top of each bowl.
- Sprinkle with fresh thyme leaves and serve.
fresh thyme leaves for garnish
✎ Notes
3-4 Knorr rich beef stock pots make a good strong stock. Essential cuisine beef stock/glace is also one of my favourites.
Is the soup thick?
The soup thickness is slightly thicker than water, but not as thick as gravy.
Can I freeze it?
Yes, you can freeze the soup, but not the cheese crouton.
Make the soup, then cook and freeze in portions in airtight containers.
Defrost overnight in the refrigerator and reheat in a pan until piping hot.
Nutritional information is approximate, per serving.
Nutrition
Calories: 478kcalCarbohydrates: 31gProtein: 13gFat: 31gSaturated Fat: 17gPolyunsaturated Fat: 2gMonounsaturated Fat: 10gTrans Fat: 1gCholesterol: 76mgSodium: 1852mgPotassium: 396mgFiber: 3gSugar: 10gVitamin A: 809IUVitamin C: 13mgCalcium: 334mgIron: 2mg