Name: Slow Cooker Vegetable Soup Recipe
Prep time: 15 min
Cook time: 4 h
Total time: 4 h 15 min
Cuisine: American
Ingredients: 1 15 oz can diced tomatoes (with the juices); 2 medium potatoes (peeled and cut into ½-inch cubes); 2 carrots (peeled and sliced ¼-inch thick); 2 stalks celery (sliced); 1 medium onion (diced); 2 cloves garlic (minced); 2 cups green beans (frozen); 1 cup corn (frozen); 1 lemon (juiced, about 2 tbsp); Fresh thyme leaves (for garnish); 1 bay leaf; ½ teaspoon dried basil; ½ teaspoon dried oregano; ¾ teaspoon kosher salt; ¼ teaspoon pepper; 6 cups vegetable broth

Jump to Recipe· 3.9 from 127 reviews

If you are searching for a comforting, wholesome meal that practically cooks itself, this Slow Cooker Vegetable Soup Recipe is a total game-changer. Packed with a colorful array of fresh veggies simmered slowly to tender perfection, it delivers hearty flavors that develop deeply with every hour. Whether you want to warm up on a chilly day or prepare a make-ahead meal that’s perfect for busy weeknights, this vibrant vegetable soup is pure magic in a bowl.

Ingredients You’ll Need

A white bowl filled with vegetable soup showing visible layers of orange carrot slices, green beans, light yellow corn kernels, red chunks of tomato, white potato pieces, and translucent onion bits, all floating in a clear orange broth. A silver spoon rests inside the bowl on the right side. Next to the bowl, there are two slices of brown multigrain bread on a white marbled surface. Another white bowl of vegetable soup is partially visible at the top right corner. Photo taken with an iphone --ar 4:5 --v 7

The beauty of this soup lies in its simplicity; each ingredient plays a crucial role in creating a perfectly balanced dish. Together, they contribute layers of texture, color, and fresh, savory flavors that are both nourishing and satisfying.

1 15 oz can diced tomatoes (with the juices): Adds a rich, tangy base that forms the heart of the soup’s broth.
2 medium potatoes, peeled and cut into ½-inch cubes: Provide a comforting creaminess and body to the soup as they soften.
2 carrots, peeled and sliced ¼-inch thick: Bring subtle sweetness and a lovely orange pop of color.
2 stalks celery, sliced: Inject freshness and a slight crunch that balances the softer vegetables.
1 medium onion, diced: Offers depth and savory undertones once cooked down.
2 cloves garlic, minced: Infuses aromatic warmth that elevates every spoonful.
1 bay leaf: Imparts subtle herbal complexity to deepen the flavor profile.
½ teaspoon dried basil: Adds an earthy hint of sweetness and brightness.
½ teaspoon dried oregano: Complements the basil with its slightly peppery and aromatic notes.
¾ teaspoon kosher salt: Balances and enhances the natural flavors of the vegetables.
¼ teaspoon pepper: For a gentle touch of spice to round out the taste.
6 cups vegetable broth: Serves as the flavorful foundation tying all ingredients together.
2 cups green beans (frozen): Added later for a pop of green and a fresh snap.
1 cup corn (frozen): Sweetness that brightens each bite and contrasts with the earthier veggies.
1 lemon, juiced (about 2 tbsp): Adds a zesty brightness that lifts the whole soup.
Fresh thyme leaves: A fragrant garnish to finish your cozy bowl with a burst of herbal freshness.

How to Make Slow Cooker Vegetable Soup Recipe

Slow Cooker Vegetable Soup Recipe - Recipe Image

Step 1: Combine the Base Ingredients

Start by layering the heart of your soup into a 6-quart slow cooker. Add the diced tomatoes with their juices, cubed potatoes, sliced carrots, celery, diced onion, minced garlic, a bay leaf, dried basil, oregano, salt, pepper, and the vegetable broth all at once. Give everything a gentle stir to bring the ingredients together, setting the stage for all those flavors to mingle beautifully as they slow cook.

Step 2: Let It Cook Low and Slow

Cover your slow cooker and set it on low for 6 to 8 hours, or alternatively on high for 3 to 4 hours. This is where the magic happens: the vegetables absorb the savory broth, soften perfectly, and the herbal notes meld into the rich tomato base creating a hearty harmony. You’ll know it’s ready when the potatoes and carrots melt easily with a fork.

Step 3: Add Frozen Veggies for Freshness

About 30 minutes before serving, fish out the bay leaf and stir in the frozen green beans and corn. Cover again to let these veggies heat through, preserving their vibrant color and just the right amount of bite. This last addition keeps the soup lively and texturally interesting without overpowering the deep flavors.

Step 4: Brighten the Flavor with Lemon

Just before you ladle the soup into bowls, squeeze in the fresh lemon juice. This simple step lifts the entire dish, giving it a fresh, zesty brightness that makes every spoonful sparkle. It’s a clever trick that makes the soup taste brighter and more vibrant without adding extra salt or spice.

Step 5: Garnish and Serve

Finish off by sprinkling fresh thyme leaves over each serving. The fragrant herbs bring a finishing touch that’s visually appealing and aromatic, inviting you to dig in with excitement.

How to Serve Slow Cooker Vegetable Soup Recipe

Garnishes

When it comes to garnishing your Slow Cooker Vegetable Soup Recipe, think fresh and simple. Fresh thyme leaves are perfect to add a hint of herbal perfume. If you’re feeling indulgent, a dollop of sour cream or a sprinkle of grated Parmesan can add creaminess and a salty contrast that makes the soup even more comforting.

Side Dishes

This soup shines as a meal on its own but pairs wonderfully with crusty bread or freshly baked rolls for dipping. A side salad tossed in a tangy vinaigrette complements the warm soup by adding crisp freshness and balance for a complete meal.

Creative Ways to Present

Don’t hesitate to get creative! Serve your soup in rustic bread bowls to wow guests or ladle it over cooked grains like quinoa or barley for a heartier twist. You can also drizzle a touch of good-quality olive oil or a sprinkle of chili flakes for an extra flavor dimension that feels special.

Make Ahead and Storage

Storing Leftovers

Leftover Slow Cooker Vegetable Soup Recipe keeps beautifully in the refrigerator for up to 4 days. Store it in an airtight container to preserve the flavors and prevent it from absorbing any fridge odors. The vegetables may continue to soften, but the soup only becomes more comforting.

Freezing

This soup freezes exceptionally well, making it a dream for meal prep. Cool it completely before transferring to freezer-safe containers or bags. It will keep perfectly for up to 3 months. Just remember to leave a little room for expansion as the soup freezes.

Reheating

When you’re ready to enjoy your leftovers, reheat the soup gently on the stove over medium-low heat, stirring occasionally until warmed through. Avoid boiling vigorously as this could overcook the vegetables. Alternatively, microwave it in short bursts, stirring in between for even heating.

FAQs

Can I use fresh green beans and corn instead of frozen?

Absolutely! Fresh green beans and corn add a wonderful crunch and sweetness as well. Just add them during the last 30 minutes of cooking in the slow cooker to avoid overcooking.

Is it possible to make this soup vegan and gluten-free?

Yes, this Slow Cooker Vegetable Soup Recipe is naturally vegan and gluten-free as long as you use vegetable broth that meets your dietary needs. It’s a great plant-based option that everyone can enjoy.

Can I add protein to make it more filling?

Definitely! Adding cooked beans like cannellini or chickpeas, or even lentils, is an excellent way to boost protein without sacrificing texture or flavor. Add them with the frozen veggies towards the end of cooking.

What if I don’t have a slow cooker? Can I make this soup on the stove?

You can absolutely simmer this soup on the stovetop. Combine all the base ingredients in a large pot, bring to a boil, then reduce to a simmer and cook until the vegetables are tender, about 45 minutes to an hour. Add the green beans and corn in the last 15 minutes.

How can I make the soup thicker if I prefer a heartier texture?

For a thicker soup, you can mash a few potatoes once cooked or add a small handful of instant potato flakes while stirring. Another trick is to cook uncovered for the last 30 minutes to allow some liquid to evaporate.

Final Thoughts

This Slow Cooker Vegetable Soup Recipe is one of those soul-warming dishes that quickly becomes a weekly favorite, especially when you want nourishment without fuss. Easy to prepare, flexible in ingredients, and bursting with fresh flavors, it’s a cozy bowl of goodness that’s perfect year-round. I encourage you to dive in, customize it your way, and savor every soothing spoonful.