This hearty Slow Cooker Vegetable Soup is the perfect cozy meal for busy days. Loaded with tender vegetables, fragrant herbs, and a bright splash of lemon, it simmers away while you go about your day. Serve it with crusty bread for a comforting lunch or light dinner that feels nourishing, wholesome, and completely satisfying.
Ingredients
- 4 cups vegetable broth
- 2 cups carrots, diced
- 2 cups celery, diced
- 1 onion, chopped
- 3 cloves garlic, minced
- 1 can (14.5 oz) diced tomatoes, undrained
- 1 cup green beans, chopped
- 1 cup corn (fresh or frozen)
- 1 teaspoon dried thyme
- 1 teaspoon dried basil
- Salt and pepper, to taste
- 2 cups kale or spinach, chopped
- 1 tablespoon lemon juice
Instructions
- In a slow cooker, combine the vegetable broth, carrots, celery, onion, garlic, diced tomatoes (with their juices), green beans, corn, thyme, basil, salt, and pepper.
- Stir everything together until the vegetables and seasonings are evenly distributed in the broth.
- Cover and cook on LOW for 6–8 hours or on HIGH for 3–4 hours, until the vegetables are very tender and flavorful.
- About 30 minutes before serving, stir in the chopped kale or spinach and the lemon juice.
- Cover and continue cooking for the remaining 30 minutes, just until the greens are wilted and tender.
- Taste and adjust seasoning with additional salt, pepper, or lemon juice as needed before serving.
Variation
- Add 1 cup of small pasta (like ditalini or elbow) or cooked rice during the last 20–30 minutes of cooking for a heartier soup.
- Stir in 1–2 cups of cooked beans (such as cannellini, chickpeas, or kidney beans) during the last 30 minutes for extra protein and fiber.
- For an herby twist, finish the soup with a handful of fresh parsley or basil and a drizzle of olive oil just before serving.
Cooking Notes
- Slow cookers vary, so start checking the vegetables for doneness at the earliest time; they should be tender but not mushy.
- If your slow cooker runs hot, consider adding delicate vegetables (like green beans and corn) halfway through cooking to keep them firmer.
- For a thicker, stew-like texture, lightly mash some of the cooked vegetables in the slow cooker just before serving.
Serving Suggestions
- Serve with warm crusty bread, garlic bread, or a simple green salad for a complete meal.
- Top each bowl with freshly grated Parmesan (if not vegan) or nutritional yeast for a savory, cheesy boost.
- Pair the soup with a grilled cheese sandwich or avocado toast for a cozy, satisfying lunch or dinner.
Tips
- Chop vegetables into similar-sized pieces so they cook evenly and finish at the same time.
- If prepping ahead, store pre-chopped vegetables in the fridge for up to 2 days, then dump and go in the morning.
- Cool leftovers completely before refrigerating; store in airtight containers for up to 4 days or freeze for up to 3 months.
Prep Time:
- Prep Time: 15 minutes
- Cook Time: 6–8 hours
- Total Time: 6–8 hours 15 minutes
Nutritional Information (Per Serving)
- Calories: 150 kcal
- Protein: 5 g
- Sodium: 550 mg (approx.)
Frequently Asked Questions
- Can I cook this soup on the stovetop instead of in a slow cooker?
Yes. Simmer everything (except greens and lemon) in a large pot for about 30–40 minutes, then add the greens and lemon and cook 5–10 minutes more. - Can I freeze this soup?
Yes. Let it cool completely, then freeze in airtight containers for up to 3 months. Thaw in the fridge overnight and reheat gently on the stove or in the microwave. - How can I add more protein to this soup?
Add cooked beans, lentils, or diced tofu during the last 30 minutes of cooking, or serve with a side of whole-grain bread. - Can I make this recipe oil-free and low-sodium?
Yes. The base recipe is naturally oil-free. Use a no-salt-added broth and limit added salt, seasoning more with herbs and lemon juice instead.
Conclusion
This Slow Cooker Vegetable Soup is everything you want in a cozy, weeknight meal: simple to prep, full of colorful veggies, and deeply comforting. Just load up the slow cooker, let it work its magic, and come back to a nourishing, aromatic pot of soup that’s perfect for sharing or saving for easy lunches all week.
Print
Slow Cooker Vegetable Soup
- Total Time: 6–8 hours 15 minutes
- Yield: 6 servings 1x
- Diet: Vegan, Vegetarian, Dairy-Free, Gluten-Free (if broth is GF)
Description
This hearty Slow Cooker Vegetable Soup is the perfect cozy meal for busy days. Loaded with tender vegetables, fragrant herbs, and a bright splash of lemon, it simmers away while you go about your day. Serve it with crusty bread for a comforting lunch or light dinner that feels nourishing, wholesome, and completely satisfying.
Ingredients
Scale
- 4 cups vegetable broth
- 2 cups carrots, diced
- 2 cups celery, diced
- 1 onion, chopped
- 3 cloves garlic, minced
- 1 can (14.5 oz) diced tomatoes, undrained
- 1 cup green beans, chopped
- 1 cup corn (fresh or frozen)
- 1 teaspoon dried thyme
- 1 teaspoon dried basil
- Salt and pepper, to taste
- 2 cups kale or spinach, chopped
- 1 tablespoon lemon juice
Instructions
- In a slow cooker, combine the vegetable broth, carrots, celery, onion, garlic, diced tomatoes (with their juices), green beans, corn, thyme, basil, salt, and pepper.
- Stir everything together until the vegetables and seasonings are evenly distributed in the broth.
- Cover and cook on LOW for 6–8 hours or on HIGH for 3–4 hours, until the vegetables are very tender and flavorful.
- About 30 minutes before serving, stir in the chopped kale or spinach and the lemon juice.
- Cover and continue cooking for the remaining 30 minutes, just until the greens are wilted and tender.
- Taste and adjust seasoning with additional salt, pepper, or lemon juice as needed before serving.
Notes
- Use a low-sodium vegetable broth if you prefer more control over the salt level.
- Frozen vegetables can replace fresh ones in equal amounts; no need to thaw first.
- The soup thickens as it sits. Add extra broth or water when reheating if you prefer a looser consistency.
- Feel free to swap kale for spinach or use a mix of both, depending on what you have on hand.
- This soup keeps well for meal prep and tastes even better the next day as the flavors meld.
- Prep Time: 15 minutes
- Cook Time: 6–8 hours
- Category: Soup
- Method: Slow Cooker
- Cuisine: American
Nutrition
- Serving Size: 1 serving (about 1 1/2 cups)
- Calories: 150 kcal
- Sugar: 7 g (approx.)
- Sodium: 550 mg (approx., varies with broth and added salt)
- Fat: 3 g (approx.)
- Saturated Fat: 0.5 g (approx.)
- Unsaturated Fat: 2.5 g (approx.)
- Trans Fat: 0 g
- Carbohydrates: 30 g (approx.)
- Fiber: 6 g (approx.)
- Protein: 5 g (approx.)
- Cholesterol: 0 mg
Keywords: slow cooker vegetable soup, crockpot veggie soup, healthy vegetable soup, vegan slow cooker soup, easy weeknight dinner