Keto & Low-Carb French Onion Soup Recipe
This hearty Keto & Low-Carb French Onion Soup delivers all the rich, caramelized onion flavor you crave—without the carbs. Topped with gooey melted cheese, it’s a cozy, comforting dish perfect for any night of the week.
Ingredients
- 4 large yellow onions, thinly sliced
- 2 tbsp butter
- 1 tbsp olive oil
- 1 tsp fresh thyme leaves (or 1/2 tsp dried)
- 1 bay leaf
- 4 cups low-sodium beef broth
- Salt and pepper, to taste
- 1 cup shredded Gruyère cheese
- 2 slices low-carb bread, optional
Instructions
- In a large pot, melt butter with olive oil over medium heat.
- Add sliced onions, thyme, and bay leaf. Cook, stirring occasionally, until onions are golden brown and caramelized, about 25–30 minutes.
- Pour in beef broth, bring to a simmer, and season with salt and pepper. Remove bay leaf.
- Preheat broiler. Divide soup into oven-safe bowls. Top each with low-carb bread slice and shredded Gruyère.
- Broil until cheese is melted and bubbly, 2–4 minutes. Let cool slightly before serving.
Nutrition Information
| Nutrient | Per Serving |
|---|---|
| Calories | 310 kcal |
| Fat | 25 g |
| Net Carbs | 6 g |
| Protein | 18 g |
FAQ
Can I use a different cheese?
Yes! Feel free to substitute with Mozzarella or Swiss for a twist.
How do I store leftovers?
Refrigerate soup in an airtight container for up to 3 days. Reheat gently on the stove.
Is this soup dairy-free?
To make it dairy-free, use ghee instead of butter and a dairy-free cheese alternative.
Can I make this ahead of time?
Prepare up to caramelizing onions a day ahead. Store onions chilled, then finish recipe when ready.
