Best Ever Caramelized Onion Soup
Deeply savory soup with sweet, slow-roasted onions and a touch of thyme—perfect for chilly evenings. This French-inspired soup recipe (vegan), ready in about 65 minutes, pairs onions, butter, chicken broth for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 220 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 large, thinly sliced onions
- 2 tbsp butter
- 4 cups chicken broth
- 1 tsp dried thyme
- 1/2 cup heavy cream
- 1/2 tsp salt
- 1/4 tsp black pepper
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Equipment for this recipe
Tools this recipe's steps call for, with a link to each on Amazon.
Instructions
- Step 1: Melt 2 tbsp butter in a large pot over medium-low heat. Add 4 cups thinly sliced onions and cook for 30-35 minutes, stirring every 5 minutes, until deeply golden and caramelized—do not rush this step or onions will burn.
- Step 2: Stir in 1 tsp dried thyme, 4 cups chicken broth, 1/2 tsp salt, and 1/4 tsp black pepper. Bring to a gentle simmer and cook uncovered for 15 minutes to meld flavors.
- Step 3: Remove from heat and blend with an immersion blender until completely smooth. Return to low heat and stir in 1/2 cup heavy cream; warm through for 3-4 minutes until heated through but not boiling.
