Authentic baked French onion soup recipe

The origins of a Classic

This soup has a long history, starting dating back to 17th-century France. Originally considered a "poor man's meal", it has since become an iconic dish of French cuisine. Its secret lies in the slowly caramelized onions, the rich broth and the crispy crust of melted cheese. It is the kind of dish that doesn't require many ingredients, but rather time and patience. And the result? It is definitely worth the effort.

Ingredients needed

To prepare this soup in authentic style, we need affordable but quality ingredients:

• 5-6 large yellow onions
• 50 g butter + 1 tablespoon olive oil
• 1 liter of beef broth (or chicken, if we prefer a milder flavor)
• 100 ml dry white wine (optional, but adds extra flavor)
• Salt, pepper, thyme
• 1 French baguette
• 150 g Gruyère or Emmental grated cheese

If we use a stainless steel vegetable slicer from KitchenShop, we can get even and thin onion slices, which helps a lot with uniform caramelization.

Caramelizing onions – the step that makes all the difference

The onion is cut into thin slices and cooked over low heat, with butter and oil, in a thick-bottomed stockpot. Patience is essential here: it takes around 30-40 minutes until the onion becomes soft, golden and acquires that specific sweet taste.

A deep cast iron or stainless steel saucepan-type pan, from KitchenShop, would be ideal for this step, it distributes heat evenly and allows for slow caramelization, with no risk of burning.

Once the onions are caramelized, add the white wine and stir well to release all the flavors from the bottom of the frying pan. Let the alcohol evaporate and then pour in the hot soup.

Add the spices and let everything simmer slowly for 15-20 minutes.

Croutons – the secret of texture

While the soup is simmering, prepare the croutons. Cut the baguette into thick slices, drizzle with a little olive oil, and brown them in the oven or in a grill pan. For a more intense flavor, rub the slices with a chopped garlic clove.

A quality bread knife, from the KitchenShop professional range, helps us obtain perfect slices without breaking the core.

Assembling and gratinating in the oven

Pour the soup into heat-resistant bowls, preferably ceramic ramekins, which we can also find in the KitchenShop offer. Place the croutons on top, and then the grated cheese in abundance. Place everything in the oven preheated to 200°C, for 10-15 minutes or until the cheese becomes golden and slightly crispy.

The final result is spectacular, a combination of intense flavors, melted cheese that spreads perfectly, and a velvety texture given by the soup.

Serving suggestions

Serve the soup hot, directly in the bowls it was gratinated in. You can sprinkle it with a little green parsley for a contrast of color and freshness. A glass of dry white wine, such as a Sauvignon Blanc, goes great with it.

If you want to take the experience to the next level, you can use a set of elegant stainless steel spoons or vintage cutlery, available in the KitchenShop range, for a truly special presentation.

Useful tips and tricks

• Use a heavy stockpot, such as cast iron or thick stainless steel, to prevent onion from burning. Cast iron retains and distributes heat excellently.
• Don't rush the caramelization process. The onions need to cook slowly, over low heat. It's a key step.
• Choose a cheese that melts well but also has flavor. Gruyère is the classic vesrion, but Emmental or Comté are good alternatives.
• For an intense flavor, add a little cognac or brandy along with the wine.
• Check the salt contents after adding the soup. Some concentrated soups may already be salty.

An oven thermometer or a quality heat-resistant baking dish can help us properly cobtrol temperature while gratinating - essentials that no kitchen should be without and that you can easily order from KitchenShop.

Why is it worth preparing it at home?

Because it is a comforting, elegant dish that is perfect for any season. It can be served as the main course for a family dinner or an impressive starter for a festive meal. It is made with affordable ingredients, but the final result looks like something from a restaurant. Plus, you can customize it to your taste – more cheese, garlic-browned croutons, red wine instead of white and so on. 

And if you want to save the leftover soup for the next day, you can use a heat-resistant container with lid, made of borosilicate glass or ceramics - from the storage items collection at KitchenShop.

French onion soup, our way

In the end, it's important to enjoy the process. Onion soup is not a recipe you can rush – it takes time, attention and a little love. But it gives so much in return: authentic flavor, enticing aromas and that feeling of having created something truly special.

Whether you are cooking it on a cold day or you want to impress a loved one, it's one of those recipes that tells a story. And with the right utensils from KitchenShop – be it cast iron frying pans, professional knives or elegant bowls – the story becomes easier to write.