Is french onion soup keto?

French onion soup

Not keto No — french onion soup is not keto-friendly.

Caramelized onions, the floating slice of baguette and a little flour give a crock of French onion soup about 25 g net carbs. Without the bread it's closer to 12 g — onions are fairly sweet, so it's still a treat rather than a staple.

Nutrition per serving

1 crock with bread and cheese · 350 g
Net carbs
25g
Calories
343kcal
Protein
16g
Fat
19g
Total carbs
27 g
Fiber
2.4 g
One serving vs. a 20 g daily net-carb limit 123%

About 71.4 g of french onion soup adds up to 5 g net carbs — about 20% of a typical serving.

Nutrition facts for french onion soup
NutrientPer servingPer 100 g
Calories343 kcal98 kcal
Total carbohydrate27 g7.7 g
Dietary fiber2.4 g0.7 g
Net carbs25 g7 g
Protein16 g4.5 g
Fat19 g5.3 g

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Better keto swaps for french onion soup

Keto substitutes for bread 7 alternatives with carb comparisons and recipes Read guide

Low-carb recipes that replace french onion soup

Frequently asked questions

Is french onion soup keto?

No — french onion soup is not keto-friendly. Caramelized onions, the floating slice of baguette and a little flour give a crock of French onion soup about 25 g net carbs. Without the bread it's closer to 12 g — onions are fairly sweet, so it's still a treat rather than a staple.

How many net carbs are in french onion soup?

1 crock with bread and cheese (350 g) of french onion soup has about 25 g net carbs (27 g total carbs minus 2.4 g fiber). Per 100 g, that's 7 g net carbs.

How much french onion soup can I eat on keto?

About 71.4 g of french onion soup adds up to 5 g net carbs — about 20% of a typical serving. On a typical 20 g daily limit, one serving uses about 123% of your carbs.

What is a good keto substitute for french onion soup?

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Source: Calculated from USDA SR Legacy ingredients for a typical recipe: onions caramelized in butter, beef broth, white wine and a little flour, topped with a baguette slice and Gruyère. Net carbs = total carbohydrate − fiber. Rating: Not keto — More than about 10 g net carbs per typical serving. Swap it for a low-carb alternative. How we rate foods. Last reviewed October 18, 2026.

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