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Hearty Slow Cooker Vegetable Soup (Easy & Healthy!)

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This Hearty Slow Cooker Vegetable Soup is a wonderfully easy, healthy, and comforting meal perfect for any time of year! It's packed with a medley of delicious vegetables like carrots, celery, potatoes, green beans, and corn, all simmered together in a flavorful broth with herbs. I absolutely love using my slow cooker for soups like this Slow Cooker Vegetable Soup - it makes getting a nutritious and satisfying dinner on the table so effortless. Just a little bit of prep, and the slow cooker does the rest! It's perfect for those cooler spring evenings or anytime you want a wholesome bowl of goodness.

Why You'll Love This Slow Cooker Vegetable Soup

  • Set It and Forget It: The slow cooker does most of the work, making it perfect for busy days.
  • Packed with Vegetables: A fantastic way to get a variety of nutritious vegetables into your diet.
  • Healthy and Comforting: Warm, flavorful, and full of wholesome ingredients.
  • Easy to Make: Requires simple chopping and minimal active cooking time.
  • Customizable: Easily adapt the vegetables based on what you have on hand or what's in season.
Ingredients for Slow Cooker Vegetable Soup, including potatoes, carrots, celery, beans, corn, tomatoes, and broth.

Ingredients for Slow Cooker Vegetable Soup

Here's what you'll need to make this hearty and healthy soup. The full list with measurements is in the recipe card below.

Vegetables & Aromatics

  • Olive oil (Oil) (Added based on instructions)
  • Yellow onion, chopped (Vegetable)
  • Carrots, peeled and chopped (Vegetable)
  • Celery stalks, rinsed and chopped (Vegetable)
  • Garlic, minced (Aromatic)
  • Diced tomatoes, undrained (Canned Vegetable)
  • Potatoes, peeled and diced (Vegetable)
  • Green beans, chopped (fresh or frozen) (Vegetable)
  • Corn kernels (frozen or fresh) (Vegetable)

Broth & Seasoning

  • Low-sodium vegetable broth (Liquid)
  • Bay leaves (Herb)
  • Dried thyme (Herb)
  • Salt (Seasoning)
  • Freshly ground black pepper (Spice)

Garnish

  • Chopped fresh parsley (Herb)

(Note: the full ingredients list, including measurements, is provided in the recipe card below.)

Variations

I love the classic combination in this Slow Cooker Vegetable Soup, but it's incredibly versatile! Here are some variations:

  • Add Beans or Lentils: Stir in a can of drained and rinsed kidney beans, chickpeas, or some brown or green lentils for extra protein and fiber.
  • Different Vegetables: Use other veggies like peas, zucchini, sweet potatoes, butternut squash, or mushrooms.
  • Add Pasta or Grains: Add some small pasta shapes (like ditalini or elbow macaroni) or barley during the last 30-60 minutes of cooking on high.
  • Make it Spicy: Add a pinch of red pepper flakes or a dash of hot sauce.
  • Add Leafy Greens: Stir in some chopped kale or spinach during the last 30 minutes until wilted.
Adding chopped vegetables to the slow cooker insert for Slow Cooker Vegetable Soup.

How to Make Slow Cooker Vegetable Soup

Let me show you how easy it is to make this delicious Slow Cooker Vegetable Soup:

Sauté Base Veggies

  1. First, I heat the olive oil in a skillet over medium-high heat. (While you can skip this and put everything directly in the slow cooker, sautéing the onions, carrots, and celery first builds a deeper flavor base!)
  2. I add the chopped onions, carrots, and celery to the skillet and cook for about 4 minutes until they start to soften.
  3. I stir in the minced garlic and cook for another 30 seconds, just until fragrant.
  4. I remove the skillet from the heat and transfer these sautéed vegetables to my slow cooker insert.

Combine Ingredients in Slow Cooker

  1. To the slow cooker with the sautéed veggies, I add the undrained diced tomatoes, diced potatoes, and chopped green beans.
  2. I pour in the vegetable broth.
  3. I add the salt, pepper, dried thyme, and bay leaves.

Slow Cook

  1. I give everything a gentle stir to combine.
  2. I cover the slow cooker and set it to cook on high for 4 hours or on low for 6 to 8 hours. During the cooking time, I might add more liquid (broth or water) if the soup seems too thick for my liking.

Finish & Serve

  1. About an hour before the total cooking time is up, I stir in the corn kernels.
  2. Once the cooking time is complete and the potatoes and vegetables are tender, I remove and discard the bay leaves.
  3. I taste the Slow Cooker Vegetable Soup and adjust the seasoning with more salt and pepper if needed.
  4. I sprinkle the soup with fresh chopped parsley.
  5. Serve

Tips and Tricks for the BEST Vegetable Soup

Here are my secrets for making this Slow Cooker Vegetable Soup truly exceptional:

  • Sauté Aromatics (Optional but Recommended): Taking a few minutes to sauté the onion, carrots, celery, and garlic before adding them to the slow cooker significantly boosts the soup's flavor base.
  • Cut Veggies Uniformly: Try to cut the potatoes, carrots, and celery into similar bite-sized pieces for even cooking.
  • Low Sodium Broth: Using low-sodium broth allows you to control the final saltiness of the soup more effectively.
  • Add Tender Veggies Later: Adding vegetables like corn and peas towards the end prevents them from becoming mushy during the long cook time.
  • Fresh Herbs: Stirring in fresh parsley at the end adds a burst of freshness.

How to Serve

This Slow Cooker Vegetable Soup is hearty and delicious served:

  • Hot: Straight from the slow cooker in warm bowls.
  • With Bread: Perfect with crusty bread, dinner rolls, or crackers for dipping.
  • With Grilled Cheese: Makes a classic comforting combination.
  • Garnished: Top with extra fresh parsley, a sprinkle of Parmesan cheese (if not vegan), or croutons.
Slow Cooker Vegetable Soup served in bowls with crusty bread on the side.

Make Ahead and Storage

This soup is fantastic for making ahead and tastes even better the next day!

  • Storage: Store leftover Slow Cooker Vegetable Soup in an airtight container in the refrigerator for up to 4-5 days.
  • Reheating: Reheat gently on the stovetop or in the microwave until heated through.
  • Freezing: This soup freezes beautifully! Let it cool completely, then transfer to freezer-safe containers or bags and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.  

FAQs about Slow Cooker Vegetable Soup

  • Can I add meat to this soup?
    • Absolutely! Brown some ground beef, turkey, or sausage first and add it to the slow cooker along with the vegetables. You could also add shredded cooked chicken towards the end.
  • Can I use different types of potatoes?
    • Yes, Yukon Gold or red potatoes also work well and you may not need to peel them if you prefer.
  • Can I cook this on the stovetop instead?
    • Yes! Sauté the veggies as directed in a large pot. Add the remaining ingredients (except corn and parsley), bring to a boil, then reduce heat and simmer covered for about 20-30 minutes, or until potatoes are tender. Stir in corn and parsley at the end.

Enjoy this healthy, comforting, and incredibly easy Slow Cooker Vegetable Soup! It's a perfect meal packed with goodness.

Print
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Slow Cooker Vegetable Soup served in bowls with crusty bread on the side.

Hearty Slow Cooker Vegetable Soup

  • Author: Caoimhe Byrne
  • Prep Time: 15 minutes
  • Cook Time: 4 hours
  • Total Time: 4 hours 15 minutes
  • Yield: 6-8 1x
  • Category: Soup, Main Course, Vegetarian
  • Cuisine: American
Print Recipe

Description

This Slow Cooker Vegetable Soup is a hearty, healthy, and comforting meal packed with vegetables. It's easy to prepare and simmers away in the slow cooker for a delicious and hands-off dinner.

Ingredients

Scale
  • 1 tablespoon olive oil (optional, for sautéing)
  • 1 yellow onion, chopped
  • 2 carrots, peeled and chopped
  • 2 celery stalks, rinsed and chopped
  • 3 cloves garlic, minced
  • 4 cups (1 liter) low-sodium vegetable broth (plus more if needed)
  • 2 (14-ounce) cans diced tomatoes, undrained
  • 3 medium potatoes (such as russet or Yukon Gold), peeled and diced
  • 1 cup chopped green beans (fresh or frozen)
  • 2 bay leaves
  • ½ teaspoon dried thyme
  • ½ teaspoon salt (or to taste)
  • Freshly ground black pepper (to taste)
  • 1 ¼ cups frozen or fresh corn kernels
  • ⅓ cup chopped fresh parsley (for garnish)

Instructions

  • Sauté Vegetables (Optional Step for Deeper Flavor):

    • Heat olive oil in a skillet over medium-high heat.
    • Add the chopped onions, carrots, and celery. Cook for 4 minutes, stirring occasionally.
    • Stir in the minced garlic and cook for 30 seconds more, until fragrant.
    • Transfer the sautéed vegetables to the insert of your slow cooker.
    • (Alternatively, if skipping this step, simply add the raw onion, carrots, celery, and garlic directly to the slow cooker in the next step).

  • Combine Ingredients in Slow Cooker: To the slow cooker, add the undrained diced tomatoes, diced potatoes, chopped green beans, vegetable broth, salt, pepper, dried thyme, and bay leaves. If you did not sauté the vegetables, add the raw onion, carrots, celery, and garlic now. Stir everything together gently.

  • Slow Cook: Cover the slow cooker and cook on low for 6 to 8 hours or on high for 4 hours, or until the potatoes and carrots are tender. Add more broth or water during cooking if the soup seems too thick or requires more liquid.

  • Add Corn: Stir in the corn kernels during the last hour of cooking (whether on low or high setting).

  • Finish and Serve: Once the vegetables are tender, remove and discard the bay leaves. Stir in the chopped fresh parsley. Taste and adjust seasoning with more salt and pepper if needed. Ladle the soup into bowls and serve hot.

Notes

  • Sautéing Vegetables: While optional, sautéing the onions, carrots, celery, and garlic before adding them to the slow cooker adds a deeper layer of flavor to the soup.
  • Vegetables: Feel free to add or substitute other vegetables like peas, zucchini, bell peppers, or sweet potatoes. Adjust cooking times if needed for heartier vegetables.
  • Broth: Use low-sodium vegetable broth to control the saltiness. You can substitute chicken broth if not strictly vegetarian.
  • Potatoes: Russet or Yukon Gold potatoes work well. Cut into uniform pieces for even cooking.
  • Storage: Store leftover soup in an airtight container in the refrigerator for up to 4-5 days. Reheat gently on the stovetop or in the microwave.  

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