Recipes › Soup › Italian Fennel Soup Recipe

Italian Fennel Soup Recipe

Recipe by Pedro M. A. Neves

This Italian fennel soup celebrates the delicate anise flavor of fresh fennel bulb, simmered with aromatic vegetables and finished with a touch of cream and Parmigiano-Reggiano. A classic preparation from central Italy, it serves as an elegant first course or light main dish that highlights seasonal produce with minimal embellishment.

Ingredients

• 2 large fennel bulbs (about 700g / 1.5 lbs), trimmed and sliced
• 1 medium yellow onion (150g / 5 oz), thinly sliced
• 3 medium potatoes (400g / 14 oz), peeled and cut into 1 cm cubes
• 4 cups (1 liter) vegetable or chicken stock
• 200ml (7 fl oz) whole milk or light cream
• 2 tablespoons (30g / 1 oz) unsalted butter
• 2 tablespoons (30ml) extra virgin olive oil
• 3 cloves garlic, minced
• 1 teaspoon (5g) sea salt, plus more to taste
• ½ teaspoon (2g) white pepper
• ¼ teaspoon (1g) ground nutmeg
• 50g (1.75 oz) Parmigiano-Reggiano, grated, plus extra for serving
• 2 tablespoons (8g) fresh flat-leaf parsley, chopped
• 1 tablespoon (15ml) fresh lemon juice

Instructions

1. Heat butter and olive oil in a large heavy-bottomed pot over medium heat. Add sliced fennel and onion, stirring occasionally, until they begin to soften and turn translucent, about 8-10 minutes.

2. Add minced garlic and cook for 1 minute, stirring constantly, until fragrant.

3. Add diced potatoes and stir to coat with the fat. Cook for 2 minutes without browning.

4. Pour in the stock slowly while stirring gently. Bring to a boil over medium-high heat, then reduce heat to medium-low and simmer uncovered for 15 minutes until potatoes are tender.

5. Stir in milk or cream, salt, white pepper, and nutmeg. Simmer for an additional 5 minutes without boiling.

6. Ladle about one-third of the soup into a blender and puree until smooth. Return the puree to the pot and stir to combine, creating a partially chunky, partially smooth texture.

7. Remove from heat and stir in grated Parmigiano-Reggiano and fresh lemon juice. Taste and adjust seasoning with additional salt and pepper as needed.

8. Divide soup among serving bowls and garnish with fresh parsley and additional grated Parmigiano-Reggiano.

Substitutions

• Substitute whole milk with vegetable cream or coconut milk for a dairy-free version (use 240ml / 8 fl oz)
• Replace Parmigiano-Reggiano with aged Pecorino Romano for a sharper, saltier flavor profile
• Use celery root (300g / 10.5 oz) mixed with fennel if fennel is unavailable, reducing fennel to 1 bulb
• Substitute butter with olive oil only for a lighter, dairy-free preparation

Tips

• Slice fennel lengthwise first, then crosswise to ensure uniform cooking and better texture distribution
• Do not over-blend; a partially chunky soup maintains better fennel texture and visual appeal than a completely smooth puree
• Warm the milk separately before adding to prevent curdling, though this soup is forgiving due to its lower acidity
• Fennel fronds reserved from trimming can be chopped and used as garnish for additional color and authentic flavor

Fennel soup is particularly beloved in Tuscany and Umbria, where fennel grows wild in spring and early summer. This soup represents cucina povera traditions—humble peasant cooking that transforms simple vegetables into nourishing, elegant dishes with minimal ingredients.

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