steaming bowl of citron and fennel soup garnished with fresh herbs

Citrus fruits

citron and fennel soup: a zesty winter warmer

By:

Savory Touch

Published:

28 Sept 2025

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There's something so incredibly uplifting about the combination of citron and fennel. The slightly sweet anise flavor of fennel perfectly complements the zesty, almost floral notes of citron. Now, I know what you might be thinking: 'Citron? Isn't that just…lemon?' Well, not quite! Citron, with its thick rind and subtle sweetness, brings a unique dimension to this soup, making it a real standout. It's like a hug in a bowl, but a really fancy, citrusy hug. One time, I tried making this with just lemon 'cause I couldn't find citron ANYWHERE, an' it was just… not the same. Don't make my mistake! Shop around! Find some citron!
close up of fresh citron and fennel bulbs
This recipe is inspired by a little bistro I stumbled upon during a trip to the South of France. The air was filled with the scent of herbs and citrus, and this soup, served with a crusty baguette, was the highlight of my meal. I've tweaked it a bit over the years to suit my own taste, adding a touch of creaminess and a hint of spice, but the essence remains the same: a celebration of simple, fresh ingredients. I think back on that bistro whenever I make this! Such fond memories...
French bistro outdoor seating with view of customers enjoying soup
Beyond its delightful taste, this soup is also packed with nutrients. Fennel is a great source of fiber and antioxidants, while citron is rich in vitamin C. So, you can feel good about indulging in a bowl of this zesty goodness. And because sometimes we just need a little sunshine in our lives, especially during those grey winter months, right? This soup definitely brings the sunshine!
nutritional information panel for citron and fennel soup

Required Equipments

  • Large Pot
  • Dutch Oven
  • Immersion Blender (Optional)
  • Ladle
  • Measuring Cups and Spoons
  • Chef's Knife

Citron and Fennel Soup: A Zesty Winter Warmer: Frequently Asked Questions

Citron and Fennel Soup: A Zesty Winter Warmer

Embrace the bright flavors of winter with this Citron & Fennel Soup, a delightful blend of citrusy citron, aromatic fennel, and comforting warmth. Perfect as a light lunch or elegant starter, this soup is both flavorful and surprisingly easy to make.

⏳ Yield & Time

Yield: 4 servings

Preparation Time: 15 minutes

Cook Time: 25 minutes

Total Time:

🍽 Ingredients

📖 Instructions

  1. Prep the Fennel: Trim the fennel bulb, reserving any fronds for garnish. Slice the bulb thinly. If you're not a fennel fan (though I urge you to reconsider!), don't be scared to experiment with other veggies to find something that suits your fancy! I once tried parsnips and they were delicious!
  2. Sauté the Aromatics: In a large pot or Dutch oven, heat the olive oil over medium heat. Add the sliced fennel and diced onion. Sauté until softened, about 5-7 minutes. Keep an eye on them, you don't want anything to burn. Burnt onions and fennel can ruin the whole pot! Trust me, I've been there...
  3. Add the Citron: Zest and juice the citron. Add the zest to the pot, reserving the juice for later. The zest is where all the magic happens, so don't skip it!
  4. Build the Flavor Base: Add the vegetable broth and bay leaf. Bring to a simmer. Reduce the heat and simmer for 15-20 minutes, or until the fennel is tender. The liquid should be bubbling slightly, not a full boil.
  5. Blend (Optional): For a smoother soup, use an immersion blender to blend until smooth. Alternatively, you can carefully transfer the soup to a regular blender in batches. If you like a chunkier soup, feel free to skip this step! I like both, honestly, so sometimes I only blend half!
  6. Add Cream and Season: Stir in the heavy cream (or coconut milk for a vegan option) and reserved citron juice. Season with salt, pepper, and a pinch of nutmeg. Taste and adjust seasonings as needed. The nutmeg adds a cozy warmth that I just love, but it's totally optional.
  7. Garnish and Serve: Ladle the soup into bowls. Garnish with reserved fennel fronds, a drizzle of olive oil, and a sprinkle of freshly cracked black pepper. Serve hot with crusty bread for dipping. Mmm... crusty bread...
  8. Enjoy!: Serve hot and watch the magic happen!

📝 Notes

  • For a vegan option, substitute coconut milk for heavy cream.
  • If citron is unavailable, use Meyer lemon for a similar flavor profile.
  • Add a pinch of red pepper flakes for a touch of heat.
  • Garnish with toasted fennel seeds for added flavor and texture.

🍎 Nutrition

Calories: 220 kcal

Protein: 4 g

Fat: 17 g

Carbohydrates: 15 g

Fiber: 3 g

Calcium: 50 mg

The best meals are those that tell a story—of the land, of the season, and of the people who share them.

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