Classic French Onion Soup (Traditional Recipe with Perfect Caramelized Onions)
Quick Info:
Prep Time: 30-45 minutes
Cook Time: 1.5-2 hours
Total Time: 2-3 hours
Servings: 4-6
Difficulty: Moderate
Dietary: Contains gluten, dairy
Equipment Needed:
– Large Dutch oven or heavy-bottomed pot
– Sharp knife
– Wooden spoon
– Oven-safe soup bowls
– Cheese grater
Alternative: Slow cooker can replace Dutch oven
Ingredients:
For the Soup Base:
– 3.5 lbs (1.6kg) yellow onions, thinly sliced
– 4 tbsp (60g) European-style butter
– 4 garlic cloves, minced
– 1 tbsp all-purpose flour (optional)
– 1/2 cup (120ml) dry white wine or vermouth
– 6 cups (1.4L) beef broth
– 1 bay leaf
– 1 tsp fresh thyme (or 1/2 tsp dried)
– Salt and pepper to taste
For Topping:
– 1 French baguette, sliced 1-inch thick
– 2 cups (200g) Gruyère cheese, grated
(Can substitute with Swiss cheese)

Method:
- Slice onions thinly and evenly (about 1/8 inch thickness).
- Heat Dutch oven over medium heat and melt butter.
- Add onions, cover, and cook for 15 minutes until translucent.
- Uncover and cook for 45-60 minutes, stirring every 5-10 minutes until deep golden brown (KEY: Onions should be mahogany colored, not blonde).
- Add garlic, cook for 1 minute.
- Sprinkle flour (if using), cook for 1 minute.
- Add wine, scraping bottom of pot to release browned bits.
- Pour in broth, add bay leaf and thyme.
- Simmer uncovered for 30 minutes.
- Meanwhile, toast baguette slices at 400°F (200°C) for 5-8 minutes.
- Ladle soup into oven-safe bowls.
- Top with toasted bread and generous cheese.
- Broil for 2-3 minutes until cheese is bubbly and golden.


Crucial Tips:
- Never rush caramelizing onions – it’s the foundation of flavor.
- Use real Gruyère cheese if possible.
- Keep onion slices uniform for even cooking.
- Don’t stir onions too frequently while caramelizing.


Storage & Variations:
Storage:
– Refrigerate soup base up to 4 days.
– Freeze without bread/cheese up to 3 months.
Common Mistakes:
- Adding onions to a cold pot.
- Rushing the caramelization process.
- Using pre-grated cheese.
- Not using oven-safe bowls.
Variations:
- Vegetarian: Use vegetable broth.
- Gluten-free: Use GF bread.
- Extra rich: Mix beef and chicken broth.
- Wine-free: Use extra broth instead.





