Slow Cooker Tomato Soup

This creamy, easy, vegan tomato soup recipe is SO delicious and perfect for fall and winter. Throw it into the slow cooker and dinner is served. 

this Recipe

Coming in with another slow-cooker recipe for you today. Is it too early for so many slow-cooker recipes at once? It may only be September, but I’m slowly getting into the mood for cooler weather and soup season.

Therefore, I made this vegan tomato soup recipe a few weeks ago when I was heading out of town for a work trip. I wanted to leave my family a few ready-to-go meals in the fridge and my husband’s first request was creamy tomato soup. 

Why we love this recipe

Save this recipe for busy days, or whenever you need an easy dinner meal. Throw everything into your slow cooker, turn it on, and dinner is ready hours later.

If you appreciate recipes that don’t require too many ingredients, then this slow cooker tomato soup is for you.

Key Ingredients

• Canned whole tomatoes
• Vegetable Broth
• Canned tomatoes
• Garlic
• Onion
• Oregano
• Cashews
• Basil

Ingredient Notes

I prefer to use whole canned tomatoes for this slow cooker tomato soup as I find those have the best tomato flavor. However, canned diced tomatoes or canned crushed tomatoes will work if that’s all you have on hand.

Low-sodium vegetable broth is usually my go-to pick, but if you use regular broth then you may not need as much added salt.

To keep things simple, I don’t add in other ingredients like carrots or celery that I normally would in a homemade tomato soup recipe. But, if you want to add in additional vegetables you are welcome to do that with the onion. Red bell pepper would also be a great option for a sweeter pairing with the tomatoes.

Most homemade tomato soups are made with butter and flour to make a roux mixture, but you don’t need that here! To cut back on additional saturated fat and cholesterol, you’ll use cashew cream instead of butter.

How to Make Slow Cooker Tomato Soup

Use Cashew Cream for Vegan Creamy Slow-Cooker Tomato Soup

To make this creamy, I stirred in a cashew cream at the end. If you haven’t made cashew cream before, it’s incredibly easy- blend together cashews and water together. That’s it! I usually make a bigger batch than is needed since my blender does better when I have a larger batch. If you have a big blender, then you might need to add more cashews and water to make this sauce.

Other alternatives to cashew cream are soy creamer or heavy cream. You just need a little to bring this soup together.

What to Serve with This Recipe

To me, nothing pairs better with tomato soup than a grilled cheese sandwich! You can serve it with your favorite cheese sandwiches, veggies, and crackers with this soup. The options are limitless! I also love pairing it with my Instant Pot rosemary bread, or a big hunk of crusty bread. 

If you are looking for a salad, then I recommend my DK House Salad or Kale Poppyseed Salad. 

Is tomato basil soup bad for you? 

This vegan tomato soup recipe couldn’t be easier and more appetizing, but we need to have a conversation around salt. The reason that most tomato soups taste bland is that they don’t contain enough salt, especially if you are starting with unsalted tomatoes. Don’t be afraid to add some salt to this soup; my rule of thumb is that if you think you are adding too much, it’s probably just enough.

Unless you need to be on a low-salt diet, I’m not that worried about salt for the average population in a dish like this. Tomatoes are rich in potassium, the counter electrolyte to sodium.

So in other words, no, tomato basil soup is not bad for you! Any meal that consists of tomatoes, garlic, and other fresh ingredients consist of nutrients that are nourishing for the body.

More Slow Cooker Recipes

• Easy Slow Cooker Vegetable Soup
• Healthy Slow Cooker Soup
• Butternut Squash Soup with Coconut Milk
• Slow Cooker Tikka Masala 
• Easy Slow Cooker Minestrone Soup

If you try this recipe, come back and leave a comment and rate it! Your feedback helps other readers and seeing you make my recipes absolutely makes my day! 

Slow Cooker Tomato Basil Soup

• Author: Alex Caspero
• Prep Time: 15 minutes
• Cook Time: 4 hours
• Total Time: 4 hours 15 minutes
• Yield: 4 large servings 1x
• Category: dinner, soup, healthy
• Method: slow cooker
• Cuisine: American
• Diet: Vegan

Description

Slow Cooker Tomato Soup! This vegan tomato soup is SO delicious and perfect for fall and winter. Throw it into the slow cooker and dinner is served. Creamy and delicious. 

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Print Recipe

Pin Recipe

• Author: Alex Caspero
• Prep Time: 15 minutes
• Cook Time: 4 hours
• Total Time: 4 hours 15 minutes
• Yield: 4 large servings 1x
• Category: dinner, soup, healthy
• Method: slow cooker
• Cuisine: American
• Diet: Vegan

• Author: Alex Caspero
• Prep Time: 15 minutes
• Cook Time: 4 hours
• Total Time: 4 hours 15 minutes
• Yield: 4 large servings 1x
• Category: dinner, soup, healthy
• Method: slow cooker
• Cuisine: American
• Diet: Vegan

Scale 1x2x3x

Ingredients

• 2 (28-ounce) cans whole peeled plum tomatoes with basil
• 1 (15-ounce) can tomato sauce
• 1 1/2 cups vegetable broth
• 4 cloves garlic, minced
• 1 onion, diced
• 1 1/2 teaspoons dried oregano
• 1 tablespoon sugar
• 1 teaspoon kosher salt
• 1/2 teaspoons freshly ground pepper
• 1/4 cup cashews
• 1/4 cup water
• 1/2 cup finely chopped basil

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Instructions

1. Place the canned tomatoes, sauce, broth, garlic, onion, oregano, sugar, salt and pepper into the base of a slow cooker and cook on high for 4-5 hours. Taste and adjust seasoning as needed, you may need more salt/sugar depending on the canned tomatoes.
2. Just before serving, add the tomato soup to a blender and puree until creamy- depending on the texture you like. You can also use an immersion blender. Return back to the slow cooker, then add the cashews and water to the base of the same blender (no need to wipe out first) and puree until very smooth. This can take about 2-3 minutes, depending on the power of your blender. (I use my nutribullet for this since it’s such a small serving. If your blender has a hard time blending things, then you’ll want to increase the cashews to 1/2 cup and 1/2 cup water.)
3. Stir the cream into the soup along with the basil. Eat!

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This slow cooker tomato soup recipe was first published September 2018 and updated February 2023. This article first appeared on Delish Knowledge.

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