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Carrot Fennel Soup

This vibrant carrot and fennel soup is a wonderful example of how roasting vegetables can transform simple ingredients into a deeply savoury, aromatic meal. By caramelising the carrots, fennel and onion in a hot oven before blending, you unlock a natural sweetness that pairs beautifully with the subtle aniseed notes of the fennel. It is a sophisticated yet easy dairy-free soup that offers a silky texture without the need for cream, making it a light and nutritious choice for any day of the week.

Perfect for a warming lunch or an elegant dinner party starter, this recipe is naturally low in fat and packed with vitamins. The addition of a homemade fennel seed oil provides a fragrant finish that elevates the earthy flavours of the dish. Serve this soup with a slice of crusty sourdough or gluten-free bread for a satisfying, wholesome meal that feels both comforting and refined.

Continue reading below

Ingredients for Carrot Fennel Soup

  • 2 medium fennel bulbs with fronds

  • 450g carrots, quartered lengthwise

  • 1 medium onion, quartered

  • 1 garlic clove

  • 80ml extra-virgin olive oil, divided

  • 1/2 teaspoons sugar

  • 600ml reduced-sodium chicken broth

  • 600ml water

  • 1 teaspoon fennel seeds

  • Equipment: an electric coffee/spice grinder

How to make Carrot Fennel Soup

Preheat oven to 232°C with rack in lowest position.

Chop enough fennel fronds to measure 1 tablespoon and reserve. Discard stalks and remaining fronds. Slice bulbs 1/4 inch thick and toss with carrots, onion, garlic, 3 tablespoons oil, sugar, 1/2 teaspoons salt, and 1/4 teaspoons pepper. Spread in a 4-sided sheet pan and roast, stirring occasionally, until browned and tender, 25 to 30 minutes.

Blend half of vegetables in a blender with broth until very smooth. Transfer to a medium saucepan. Repeat with remaining vegetables and water. Thin to desired consistency with extra water and simmer 2 minutes. Season with salt and pepper.

Meanwhile, finely grind fennel seeds in grinder and stir into remaining 2 tablespoons oil. 3Serve soup drizzled with fennel oil and sprinkled with reserved fronds.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.

Article history

The information on this page is peer reviewed by qualified clinicians.

  • 16 Jan 2026 | Originally published

    Authored by:

    UK recipe editors

    Peer reviewed by

    UK recipe editors
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