Slow-Cooker Red Lentil Pumpkin Soup

Updated August 24, 2026

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Ready In
4 hr
Rating
5(1,687)
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The unexpected combination of red lentils and canned pumpkin make the base of this richly spiced, hands-off soup, seasoned with earthy turmeric, smoky paprika and citrusy coriander. The slow-cooker recipe leans on budget-friendly pantry items for a lot of flavor payoff with very little work. Before serving, it takes just 10 minutes to toast pepitas with cumin and fry some chopped red onion, quickly yielding finishing touches that make an outsize contribution. You can also make this soup on the stovetop: Just combine the ingredients in a large pot as you would the slow-cooker, bring to a low simmer and cover the pot. Cook, stirring occasionally, until the lentils are tender, about 30 minutes. (You may need to adjust the texture for the stovetop by adding a little bit more water.) 

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Ingredients

Yield:4 to 6 servings
  • 1½ cups red lentils

  • 1 (15-ounce) can pumpkin purée

  • 1 teaspoon ground turmeric

  • 1 teaspoon smoked paprika

  • 1 teaspoon ground coriander

  • ½ teaspoon crushed red pepper (optional) 

  • ¼ teaspoon ground cinnamon

  • 4 tablespoons olive oil, divided

  • Kosher salt (such as Diamond Crystal)

  • ½ cup pepitas (pumpkin seeds)

  • ½ teaspoon cumin seeds

  • 1 red onion, chopped 

  • 1 lemon, juiced

Ingredient Substitution Guide
Nutritional analysis per serving (4 to 6 servings)

42 grams carbs; 350 calories; 9 grams monounsaturated fat; 4 grams polyunsaturated fat; 2 grams saturated fat; 15 grams fat; 9 grams fiber; 407 milligrams sodium; 16 grams protein; 5 grams sugar

Note: The information shown is Edamam’s estimate based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist’s advice.

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Preparation

  1. Step 1

    Add the lentils, pumpkin, turmeric, paprika, coriander, red pepper, cinnamon, 1 tablespoon olive oil and 1 tablespoon salt to a 6- to 8-quart slow-cooker; top with 5 cups water and stir to combine. Cook on high for 4 hours or on low for 6 hours, until the lentils are tender. (This soup holds well on warm if you need flexibility.)

  2. Step 2

    Before serving, warm 1 tablespoon olive oil in a small skillet over high heat. Add the pepitas, cumin seeds and, if the pepitas are unsalted, a pinch of salt. Cook, stirring constantly, until the pepitas are toasted and the cumin is sizzling and popping, 2 to 3 minutes. 

  3. Step 3

    Scrape the seasoned pepitas onto a paper-towel lined plate. Put the skillet back over high heat and add the remaining 2 tablespoons olive oil, the red onion and a generous pinch of salt. Cook, stirring often, until the onion is browned and softened, about 8 minutes. 

  4. Step 4

    Scrape the onion and its oil into the soup along with the lemon juice and stir to combine. Taste and add additional salt if necessary. 

  5. Step 5

    Serve the soup in bowls and sprinkle with the toasted pepitas. The soup will thicken as it cools, so adjust the texture with additional water as necessary.

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Ratings

5 out of 5
1,687 user ratings
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Comments

This soup was terrific and easy to make on a Saturday morning as rain and snow approached. Since I was juicing an entire lemon anyway, I zested it as well and added the zest, a habit I learned from Abra Berens in her Ruffage cookbook, and the extra lemon truly heightened the flavor of the soup, as it always does. I also sauteed the onions on medium-high rather than high, which caramelized them rather than blackened them. Love both lentil soups as well as pumpkin. Greens would be a welcome addition, and I will likely stir in some baby arugula to the rest of the pot. Would definitely make again--always welcome and look forward to this author's slow-cooker and soup recipes, and I love soup all year round but especially in the cooler months.

I appreciate that this is a really budget friendly recipe but unique! Many families will need recipes like this made from pantry items more than ever.

If you are in a rush 16 minutes in an instant pot at high pressure works well.

Made mostly as directed, used 1/2 TB of iodized salt, which is what I had on hand. It could use more water/liquid, maybe 2 more cups? Otherwise it’s like baby food, as others have noted. I couldn’t toast the pepitas or do the onions (made this while I wait for a part for my oven/range). Served with dry roasted/salted pepitas and dried crunchy onions and was delicious. Will definitely add to our rotation of soups.

Bit confused as to why add oil along with all the other ingredients then immediately water on top. Should one fry the spices lightly before adding the water? If not, why add the oil at all? It’s in the slow cooker now - I look forward to tasting later today.

Delicious. We don’t have canned pumpkin in Australia so I added approx 2 cups if fresh cubed pumpkin and it boiled down beautifully. Was out of red onions and pepitas seeds so used white onion and sunflower seeds. Substitutes worked well

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