Gruyere-Infused French Onion Soup
A classic French onion soup with slow-simmered onions, rich beef broth, and melted Gruyere cheese on top. This French-inspired soup recipe, ready in about 90 minutes, pairs yellow onion, butter, all-purpose flour for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 4 cups, thinly sliced yellow onion
- 3 tbsp butter
- 1 tbsp all-purpose flour
- 4 cups beef broth
- 1/2 cup dry white wine
- 1 cup, grated Gruyere cheese
- 1 slice, toasted baguette
- 1/2 tsp salt
- 1 tsp, chopped fresh thyme
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Equipment for this recipe
Top-rated tools to make this recipe successfully.
Instructions
- Step 1: Melt 3 tbsp butter in a large pot over medium-low heat. Add 4 cups thinly sliced yellow onions and cook for 40 minutes, stirring every 5 minutes, until deeply golden and caramelized.
- Step 2: Stir in 1 tbsp all-purpose flour and cook for 2 minutes until golden, then pour in 1/2 cup dry white wine to deglaze the pot, scraping up any browned bits.
- Step 3: Add 4 cups beef broth and 1 tsp chopped fresh thyme. Bring to a simmer and cook uncovered for 25 minutes to develop flavor.
- Step 4: Season with 1/2 tsp salt. Ladle soup into oven-safe bowls and top each with 1/4 cup grated Gruyere cheese.
- Step 5: Broil 4 inches from the heat for 2-3 minutes until the cheese is bubbly and golden, then serve immediately with a toasted baguette slice.
Frequently asked questions
How long does Gruyere-Infused French Onion Soup take to make?
Total time is about 90 minutes (25 min prep + 65 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Gruyere-Infused French Onion Soup?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep yellow onion from drying out.
Can I substitute ingredients in Gruyere-Infused French Onion Soup?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Gruyere-Infused French Onion Soup for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Gruyere-Infused French Onion Soup?
French soups like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
What others are saying
- ★★★★☆
Solid recipe. Not groundbreaking but definitely making it again.
- ★★★★☆
Very good for a 65-minute recipe. Would bump up the spice level though.
- ★★★★☆
Enjoyable meal. Instructions could be a touch more detailed on the timing.
