Classic Homemade French Onion Soup Recipe – Bistro-Style Perfection

Craving a warm, rich bowl of French onion soup like the one from your favorite bistro? Now you can make it at home! With a little patience and simple ingredients, this classic dish is easier than you think.

Why You’ll Love This Recipe

• Authentic Bistro Flavor: Slow-caramelized onions and rich beef broth create a deep, savory taste.
• Comforting & Cozy: A perfect dish for cold nights or a comforting meal anytime.
• Simple Yet Impressive: Great for family dinners or entertaining guests.

Ingredients

For the Soup:

For Serving:

Step-by-Step Instructions

1. Caramelize the Onions

1. Peel and slice onions and shallots into 1/8-inch thick slices.
2. Heat olive oil in a large heavy-bottomed pot over medium heat.
3. Add onions, shallots, and a pinch of salt, stirring occasionally until they become translucent.
4. Reduce heat to low, add butter, and continue cooking, stirring occasionally for 45-60 minutes until onions are deep golden brown.
   • Tip: If onions start sticking, add a splash of water to loosen them up.

2. Build the Soup

1. Sprinkle flour over the caramelized onions, stirring continuously.
2. Pour in dry marsala wine, scraping the bottom to deglaze the pot.
3. Add beef stock, beef base, thyme, and bay leaves.
4. Bring to a simmer over medium heat and let cook uncovered for 20-30 minutes.
5. Remove thyme stems and bay leaves, then season with salt and pepper to taste.

3. Prepare the Cheese Toast

1. Preheat the broiler and adjust the oven rack to the top position.
2. Butter both sides of bread slices and toast in a skillet over medium-high heat until golden on both sides.

4. Assemble & Broil

1. Place oven-safe soup bowls on a baking sheet and fill each halfway with soup.
2. Top with a toasted bread slice, then generously sprinkle with grated gruyere.
3. Broil for 2-3 minutes, or until cheese is melted and bubbly.
4. Garnish with fresh chives and serve immediately.

Make-Ahead & Storage Tips

• Refrigeration: Store soup (without bread and cheese) in an airtight container for up to 3 days.
• Freezing: Freeze for up to 2 months and thaw overnight in the refrigerator before reheating.
• Reheating: Warm on the stove over medium heat, then assemble with fresh cheese toast before serving.

Serving Suggestions

French onion soup pairs beautifully with:

• A fresh green salad for a balanced meal.
• Pan-fried steak or roast chicken for a hearty dinner.
• A French 75 cocktail for a classic bistro experience.

FAQs

Can I Make This Vegetarian?

Yes! Swap out the beef stock for vegetable stock and use a vegetarian umami booster like mushroom base instead of beef base.

What If I Don’t Have a Broiler?

Toast the bread separately, melt the cheese on top using a toaster oven, then place it on the soup before serving.

Can This Be Made Gluten-Free?

Absolutely! Use gluten-free bread and omit the flour (or use a gluten-free alternative) in the soup.