Creamy Fennel and Leek Soup

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A velvety soup featuring tender fennel and leeks simmered with potatoes and cream for comforting, aromatic warmth. This french-inspired soups ready in about 45 minutes pairs butter, white part only, thinly sliced leek, finely diced fennel bulb for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 200 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.

Prep: 15 min Cook: 30 min Serves 4 French cuisine 200 cal/serving
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Ingredients

Instructions

  1. Step 1: Melt 2 tbsp butter in a large pot over medium heat. Add 1 sliced leek and cook for 3 minutes until softened.
  2. Step 2: Stir in 1 finely diced fennel bulb and 1 chopped onion, cooking for 5 minutes until vegetables are tender.
  3. Step 3: Add 3 minced garlic cloves and cook for 1 minute until fragrant.
  4. Step 4: Pour in 4 cups vegetable broth and add 1/2 cup diced potatoes. Bring to a simmer and cook for 15 minutes until vegetables are very soft.
  5. Step 5: Use an immersion blender to puree the soup until smooth, or transfer to a blender in batches.
  6. Step 6: Stir in 1/2 cup heavy cream and heat gently for 2 minutes without boiling. Season with salt to taste before serving.

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Frequently asked questions

How long does Creamy Fennel and Leek Soup take to make?

Total time is about 45 minutes (15 min prep + 30 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 Creamy Fennel and Leek 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 butter from drying out.

Can I substitute ingredients in Creamy Fennel and Leek 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 Creamy Fennel and Leek 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 Creamy Fennel and Leek 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.

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