Sweet potatoes, red bell peppers, white onion, vegetable broth, cumin, and smoked paprika go into the slow cooker together. The pot runs on low for 8 hours or high for 4 and serves four people. Fresh lime juice goes in at the finish, added only after the soup is blended.

Lime juice added before the long cook becomes dull and flat by the time the pot is done. Citrus loses its brightness at slow cooker temperatures over 8 hours, so it no longer lifts the finished soup. Adding it raw after blending keeps the acid sharp and gives the bowl the citrus contrast it needs.

Sweet potatoes need to be fully soft before blending, and undercooked pieces leave a gritty texture in the soup. Eight hours on low breaks down the starch completely, which is what allows the soup to blend smooth. Trying to blend while any firmness remains leaves lumps that a second blending pass cannot fully fix.

Slow Cooker Sweet Potato and Red Pepper Soup

Recipe by Shili MohamedCourse: Dinner, SoupsCuisine: AmericanDifficulty: Easy

Servings

4

servings

Prep time

10

minutes

Cooking time

8

hours 

Calories

271

kcal

Slow Cooker Sweet Potato and Red Pepper Soup made with two pounds of sweet potatoes, red bell peppers, smoked paprika, and lime. Four servings in 8 hours

Ingredients

• Soup

• 2 pounds sweet potatoes, peeled and cubed

• 2 red bell peppers, sliced into 1-inch strips

• 1 medium white onion, roughly chopped

• 4 cups vegetable broth

• 1 teaspoon sea salt

• 1 teaspoon ground cumin

• 1 teaspoon smoked paprika

• Finishing

• 1 lime, juiced

Directions

• Peel and cube the sweet potatoes. Slice the red bell peppers into 1-inch strips. Roughly chop the onion.
• Add the sweet potatoes, red bell peppers, onion, vegetable broth, sea salt, cumin, and smoked paprika to a slow cooker. Stir to combine.
• Cover and cook on low for 8 hours or high for 4 hours, until the sweet potatoes are fully tender.
• Blend the soup until smooth using an immersion blender, or ladle into a blender in batches. If using a countertop blender, cool for 10 minutes first and blend in batches.
• Stir in the juice of 1 lime. Taste and adjust seasoning, then reheat on low if needed before serving.

FAQs

Can I use orange or yellow bell peppers instead of red?

Orange or yellow bell peppers swap in directly with no change to timing or quantities. Red bell peppers are the sweetest of the three, which balances the earthiness of the sweet potato without adding bitterness. Orange lands close to that sweetness level; yellow is slightly milder and produces a lighter-colored soup.

Why did my soup turn out thin after blending?

Thin results almost always trace back to sweet potatoes that were not quite tender before blending. Check tenderness with a fork before blending, since the pieces should pierce with no resistance at all. Starting with 3 cups of broth rather than 4 on the next batch also helps dial in the thickness.

Can I make the soup richer or creamier?

Stirring ¾ cup of full-fat coconut milk or heavy cream into the blended soup off the heat turns it into a noticeably richer bowl. Coconut milk keeps it vegan; heavy cream adds a more traditional dairy finish. Both work at full quantity with no adjustment to the lime juice or seasoning.

What other slow cooker soup works on a different night with a tomato base?

A tomato-forward soup changes the flavor profile completely while keeping the same slow cooker format and hands-off approach. A slow cooker tomato soup on this site builds from ripe fresh tomatoes and cooks on low for several hours. The two cover opposite ends of the vegetable soup range without overlapping.

What slow cooker vegetable soup uses a simpler two-ingredient base?

On lighter nights, a leek and potato soup covers a milder slot without overlapping the sweet potato and pepper profile. A slow cooker leek and potato soup on this site uses two vegetables with a straight broth base and no added spice blend. Together the two give a weekly vegetable rotation two distinctly different blended bowls from the same appliance.