Panera Bistro French Onion Soup Nutrition by Serving Size

Here is the detailed nutritional breakdown from Panera’s September 2, 2026 nutrition guide.

Nutrient	Cup	Bowl	Bread bowl
Calories	200	300	850
Total fat	10 g	14 g	12 g
Saturated fat	5 g	8 g	6 g
Cholesterol	20 mg	30 mg	20 mg
Sodium	1,210 mg	1,820 mg	2,550 mg
Carbohydrates	22 g	33 g	158 g
Dietary fiber	1 g	1 g	5 g
Total sugars	11 g	16 g	15 g
Protein	6 g	10 g	27 g

Panera Bistro French Onion Soup Ingredients

The Panera French onion soup ingredients include onions, tomato sauce, butter, seasonings, a vinegar-based gastrique, chicken stock, and chicken-flavored broth components. Panera also lists Asiago cheese and croissant croutons as toppings.

Here is a simpler breakdown of the main components:

The detailed ingredient declaration also includes cornstarch, yeast extract, soybean oil, black pepper, thyme, and other flavoring and thickening ingredients. One detail worth understanding is that chicken-derived ingredients are part of the soup base itself. They are not limited to an optional topping.

Is Panera Bistro French Onion Soup Vegetarian?

No. Panera Bistro French Onion Soup is not vegetarian according to its published ingredient declaration.

Although onions are the main ingredient, the soup also contains:

These ingredients make the soup unsuitable for vegetarians. Removing the Asiago cheese or croissant croutons does not solve the issue because the chicken-derived ingredients remain in the broth.

If you follow a vegetarian diet, do not assume that French onion soup is meat-free simply because it does not contain visible pieces of meat.

Panera French Onion Soup Allergens and Dietary Information

Panera identifies three allergens in its Bistro French Onion Soup:

Here is what readers should know about each one.

Does Panera French Onion Soup Contain Dairy?

Yes. The ingredient declaration lists butter and Asiago cheese, both of which contain milk ingredients. If you’re avoiding dairy you should not consider the standard soup dairy-free.

Does Panera French Onion Soup Contain Gluten?

The soup contains wheat-containing ingredients, including soy sauce and croissant croutons. The bread bowl also contains wheat-based bread ingredients.

Therefore, the standard product should not be considered gluten-free. Removing the croutons does not automatically make the soup gluten-free because wheat is also listed in the soup base.

What Does Panera Bistro French Onion Soup Taste Like?

Panera describes its Bistro French Onion Soup as sweet caramelized onions in a savory broth, finished with a sherry wine vinegar gastrique and sea salt. The topping includes Asiago cheese and croissant croutons.

These components provide a combination of onion sweetness, savory broth, cheese, and a bread-based topping. The vinegar gastrique adds a tangy element to the flavor profile. This is the manufacturer’s product description rather than a personal taste-test review.

Can You Make Panera French Onion Soup at Home?

If you are searching for a Panera French onion soup recipe, it is important to distinguish Panera’s actual restaurant ingredients from a homemade interpretation. Panera publishes its ingredient declaration, but that is not the same as providing its complete proprietary restaurant recipe.

You can make a homemade French onion soup inspired by the menu item using:

Simple Homemade Preparation

1. Melt the butter in a large pot over medium-low heat.
2. Add the sliced onions and cook slowly until soft and deeply golden, stirring regularly.
3. Stir in the tomato paste and cook briefly.
4. Add the broth, vinegar, salt, and black pepper.
5. Simmer for approximately 20 minutes to allow the flavors to combine.
6. Serve in bowls with Asiago cheese and croutons.

This is a homemade French onion soup variation, not Panera’s official recipe. It also does not reproduce Panera’s chicken-derived broth or exact ingredient formulation.

Frequently Asked Questions