Remy's French Onion Soup Recipe: Caramelized Layers and Crispy Cheese Top

Remy's French onion soup recipe brings Parisian bistro elegance to your kitchen with its signature caramelized onions and golden cheese crust. The secret lies in slow-cooking onions until they're deep brown and sweet, creating layers of flavor that build as the beef broth simmers.

I've perfected this technique over years of testing—what starts as simple ingredients transforms into something restaurant-worthy through patience and precise timing.

This recipe delivers crispy cheese on top that's impossible to resist, while the broth remains rich and aromatic beneath. The caramelization process takes about 45 minutes, but it's worth every minute for that deep, complex flavor.

You'll need just 10 basic ingredients—quality onions, beef broth, and a touch of brandy for depth—plus a few pantry staples for the topping.

The result is a soup that's both comforting and sophisticated, with tender onions swimming in savory broth and crowned by a crispy cheese crust that's still soft inside.

The aroma alone will have everyone gathering at your table, and the first bite delivers that perfect balance of sweet, savory, and umami flavors. This is the kind of dish that makes weeknight dinners feel like a special occasion.

Serve with a simple green salad and crusty bread to soak up every last drop of that flavorful broth. The recipe scales easily for a crowd, and leftovers reheat beautifully—just be sure to crisp the cheese topping fresh before serving. Here's how to make it perfectly every time.

Ingredients for remy's soup

Ten simple ingredients transform into a bistro-worthy French onion soup with deep caramelized flavor and crispy cheese top.

The onions are the heart of this dish—yellow onions work best for their natural sweetness, but red onions add color without compromising flavor. Look for firm, dry onions with crisp outer skins at Whole Foods or your local specialty market. Costco often sells large bags of onions at a better price, but avoid any with soft spots or sprouting. Thinly slicing them (about 1/8-inch thick) ensures even caramelization. For a shortcut, pre-sliced onions from the salad bar work, but they won't caramelize as beautifully.

No brandy? Dry sherry or apple cider adds depth without overpowering. Substitute the flour with cornstarch for a gluten-free option, though the texture will differ slightly. The cheese blend is key—Gruyère provides that signature nutty flavor, but Comté or Emmental work well too. If you can't find Gruyère, Swiss cheese is a decent alternative. For the bread, baguette slices are ideal, but any crusty bread will do. Avoid pre-sliced sandwich bread—it won't crisp up properly.

This soup reheats beautifully, but the cheese topping must be crisped fresh before serving. Store the soup (without the cheese) in the fridge for up to 4 days or freeze for 3 months. To reheat, warm the broth gently, then crisp the cheese topping under the broiler for 2-3 minutes. For a crowd, double the recipe—just ensure your oven can handle two large baking dishes. The caramelized onions can also be prepped ahead and refrigerated for 3 days, saving time on cooking day.

Step-by-step instructions for remy's French onion soup recipe

Mastering this classic requires patience and precision—here's how to build deep caramelized layers and that signature crispy cheese top.

Melt the 0.5 cup unsalted butter in a large Dutch oven over medium-low heat. Add the 4 large yellow onions, sliced thinly, and stir to coat evenly. Reduce heat to low and let them cook undisturbed for 30 minutes, stirring occasionally. The onions should transform from pale to deep golden brown, developing complex sweetness and texture.

Here's the key: don't rush this step. You're building flavor through slow cooking. When the onions are caramelized and the butter has mostly rendered out (about 15-20 minutes remaining), add the 1.5 teaspoons salt and 0.5 teaspoon black pepper. The onions should be soft enough to break down easily but still hold their shape. If they start to stick, add 1 tablespoon of beef broth to deglaze.

Pour in the 0.25 cup brandy and stir vigorously, letting it bubble away for 1-2 minutes to cook off the alcohol. This step adds depth of flavor that's essential to the soup's character. Immediately add the 4 minced garlic cloves and cook for 30 seconds until fragrant—don't let them brown or they'll become bitter.

Sprinkle the 2 tablespoons all-purpose flour over the onions and stir to coat completely. Cook for 1 minute to toast the flour slightly, then gradually whisk in the 6 cups beef broth, 1 cup at a time, ensuring no lumps form. Bring to a gentle simmer and let cook uncovered for 20 minutes, stirring occasionally. The mixture should reduce slightly and develop a rich, thick consistency.

While the soup simmers, preheat your broiler to high. Arrange the 8 baguette slices on a baking sheet in a single layer, leaving space between each. Brush both sides lightly with any remaining butter from the Dutch oven (about 1 tablespoon) using a pastry brush. This creates a golden crust while keeping the bread crisp.

Toast the baguette slices for 3-4 minutes until they're golden brown and crisp to the touch. Watch them carefully—they'll darken quickly under the broiler. Remove from the oven and set aside on a wire rack. The slices should hold their shape when lifted but still be slightly pliable.

Ladle the hot onion soup into 4 oven-safe bowls or ramekins, filling each about 3/4 full. Place a toasted baguette slice on top of each bowl, pressing down gently to ensure good contact with the soup. This helps create an even, crispy crust.

In a small bowl, combine the 1.5 cups gruyère cheese and 0.5 cup parmesan cheese. Sprinkle half of this mixture evenly over each baguette slice, making sure to cover the entire surface. The cheese should melt into the bread, creating that signature golden crust. Place the bowls on a baking sheet to catch any potential spills.

Position the oven rack 4-5 inches from the broiler element and broil for 3-5 minutes until the cheese is deeply golden brown and bubbling vigorously. Watch carefully—the cheese can go from perfect to burnt in seconds. You're aiming for a crispy, caramelized top that contrasts beautifully with the rich soup below.

Remove from the broiler and let rest for 2-3 minutes before serving. The cheese should be firm enough to hold its shape when lifted gently with a spoon. Serve immediately while the bread is still crisp and the cheese maintains its perfect texture. Each spoonful should deliver layers of caramelized onion, rich broth, and that irresistible crunch from the cheese-topped bread.

Serving suggestions for remy's soup

Classic Pairings

Serve this French onion soup with a simple mixed greens salad tossed in a light vinaigrette—I love using 1 tbsp Dijon mustard, 2 tbsp olive oil, and 1 tbsp balsamic vinegar.

The acidity cuts through the richness of the soup beautifully. For extra flair, add toasted walnuts and crumbled goat cheese to the salad. 🥗

Bread Basket

Set out a basket of warm baguette slices or crusty sourdough for dipping. I always keep a small bowl of garlic butter (mix 2 tbsp softened butter with 1 minced garlic clove) nearby for extra flavor.

The bread soaks up every last drop of that flavorful broth. For a crowd, use a French bread loaf cut into thick slices.

Wine Pairings

A crisp Burgundy Pinot Noir complements the dish perfectly—its earthy notes mirror the caramelized onions. I recommend Louis Jadot Bourgogne Pinot Noir for a mid-range option that won't break the bank. For white wine lovers, a Chardonnay with slight oak character works well, like Kendall-Jackson Vintner's Reserve. Avoid heavy reds that might overpower the delicate flavors. 🍷

Cheese Course

End the meal with a selection of French cheeses to continue the theme. I suggest Brie de Meaux, Comté, and Roquefort for a classic trio. Serve with sliced baguette and grape jelly for dipping. The contrast between the creamy Brie and tangy Roquefort balances the richness of the soup beautifully.

Dessert Shortcut

For a no-fuss dessert, serve crème brûlée or vanilla ice cream with a drizzle of caramel sauce. The sweetness cleanses the palate after such a rich meal.

I often make a quick batch of homemade crème brûlée using 2 cups heavy cream, 1 cup whole milk, and 6 egg yolks sweetened with ½ cup sugar. A quick torch with granulated sugar on top adds that signature crackle. 🍮

Presentation Tips

Use oven-safe ceramic bowls or ramekins for serving to maintain the crispy cheese topping. Garnish each bowl with a sprig of fresh parsley before broiling. For an elegant touch, place the bowls on a wooden board with a linen napkin underneath to catch any drips.

Serve immediately so the cheese stays crispy and the bread maintains its perfect texture. ✨

Frequently asked questions