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Parsnip and Leek Soup with Cumin and Mustard Seeds

Scott Phillips

Yield: Yields 8 to 9 cups.

Servings: six to eight.

This soup gets a delicious kick from whole cumin and mustard seeds toasted in hot oil with garlic and stirred in just before serving. This traditional Indian seasoning technique is called tarka.


  • 2 Tbs. unsalted butter
  • 1 large yellow onion, cut into medium dice (2 cups)
  • Kosher salt and freshly ground black pepper
  • 6 cups lower-salt chicken broth; more as needed
  • 2 medium leeks (white and light-green parts only), trimmed, washed, and sliced crosswise about 1/2 inch thick (2-1/2 cups)
  • 1 lb. medium parsnips, peeled, cored, and cut into medium dice (about 2 cups)
  • 1 lb. yellow potatoes (like Yukon Gold), peeled and cut into medium dice (2-3/4 cups)
  • 2 tsp. ground turmeric
  • 1/2 tsp. cayenne
  • 2 Tbs. extra-virgin olive oil
  • 4 medium cloves garlic, roughly chopped
  • 2 tsp. cumin seed
  • 2 tsp. black mustard seed

Nutritional Information

  • Calories (kcal) : 200
  • Fat Calories (kcal): 70
  • Fat (g): 8
  • Saturated Fat (g): 2.5
  • Polyunsaturated Fat (g): 1
  • Monounsaturated Fat (g): 4
  • Cholesterol (mg): 10
  • Sodium (mg): 140
  • Carbohydrates (g): 29
  • Fiber (g): 5
  • Protein (g): 6


  • Heat the butter in a 6- to 8-quart heavy-duty pot over medium heat. Add the onion, 1/2 tsp. salt, and a couple of grinds of pepper and cook, stirring occasionally, until the onion is soft and lightly browned, 8 to 10 minutes. Add the broth, leeks, parsnips, and potatoes and raise the heat to medium high. Simmer briskly for 5 minutes and then reduce the heat to low. Add the turmeric and cayenne, stirring well, and simmer slowly until the vegetables are very soft, about 20 minutes.

    Working in batches, purée the soup in a blender and then strain it through a medium-mesh sieve. The soup should be about as thick as a thin milk shake; add more broth if it’s not thin enough. Return the soup to the pot and season to taste with salt. (The soup can be made up to this point 1 day ahead and refrigerated. Reheat before proceeding.)

    Shortly before serving, heat the olive oil in a small skillet over medium-high heat. When the oil is hot, add the garlic, cumin seed, and mustard seed. Stir with a wooden spoon until the seeds begin to pop and the garlic is lightly browned, 30 to 60 seconds. Carefully stir the hot oil and spices into the soup (it may spatter). Season to taste with more salt, pepper, or cayenne.


Rate or Review

Reviews (5 reviews)

  • User avater
    JenniferFGarland | 10/29/2018

    It is healthy

  • IslandTractor | 04/22/2015

    This recipe is essentially just a classic leek and potato soup with some parsnips thrown in and then some Indian spices to give it a different character. It is easy to make and an interesting change from the standard recipe. The parsnips add nothing to the flavor as the cumin and mustard seeds simply over power subtle flavors. Even the leeks are much less prominent than in the classic recipe. I'll make it again but not as often as plain old leek and potato soup which is a much loved standard in our house.

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