Slow Cooker Tomato Basil Soup

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This slow cooker Tomato Basil Soup recipe tastes like you spent hours slaving in the kitchen. It’s delicious, easy, economical!

slow cooker tomato basil soup - Marty's Musings

When I first started blogging I adopted the tagline “home is where your story begins,” Making memories with my family and telling stories is an important part of my identity.

With two adult married children, two grandsons and another on the way, and only one kid living at home, we cherish every opportunity to create memories together.

We have many Christmas traditions but interestingly enough, none really center around food. Unlike Thanksgiving, where the menu is set in stone and repeated every year, we don’t have a set menu for our time together. 

For us, it’s just all about being together and enjoying those qualities that make us family: sharing laughter; reminiscing over family stories and playing games around the table. (Although playing games is a lot more difficult with little creatures running around!)

We’re not perfect and while everyone has their little (or big) quirks, we know God divinely brought us together through both the bond of blood and adoption.

It’s the most wonderful time of the year! 

Slow Cooker Tomato Basil Soup - Marty's Musings

I love using my slow cooker for easy recipes (even though my hubby can’t stand it in the summer!)

I’ve been looking for a slow cooker tomato basil soup recipe that would fill the house with scrumptious smells while we celebrate the season together.

Slow Cooker Tomato Basil Soup - Marty's Musings

I have to confess I wasn’t really a tomato soup lover, but I have changed my tune thanks to this recipe.

My secret ingredient? Marinara sauce and roasted bell pepper strips. 

I’d like to show you pictures of each step but I know y’all are smart cooks.

Plus I had a little run in with a blender. Let’s just say I baptized our new countertops and bead board! You can definitely leave out that step!

Slow Cooker Tomato Basil Soup - Marty's Musings

A bowl of soup, with Basil and Tomato
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5 from 1 vote

Slow Cooker Tomato Basil Soup

Homemade Tomato Basil Soup using the slow cooker saves time but still tastes great!
Author Marty's Musings


  • 1 24.5- oz. marinara sauce
  • 1 28- oz can crushed tomatoes
  • 1/2 cup roasted bell pepper strips diced (optional)
  • 1 shallot or onion, diced
  • 1 tsp dried oregano
  • 1/4 cup fresh basil minced
  • 4 cups chicken broth
  • 1/2 cup flour
  • 1/2 cup margarine
  • 1 cup grated Parmesan Cheese
  • 2 cups half and half
  • salt and pepper to taste


  • Put marinara, tomatoes, bell pepper strips, shallot and chicken broth into slow cooker.
  • Cook on low for 5-7 hours or on high for 3 hours.
  • Thirty minutes before serving make the roux.
  • Melt butter over low heat in a skillet and add in flour.
  • Stir constantly for about 5 minutes.
  • Slowly add in 1 cup of hot soup.
  • Add in 3 more cups of soup and stir until smooth.
  • Put all back into the slow cooker.
  • Stir and add parmesan cheese, half and half, salt and pepper, oregano and basil.
  • Heat on high for another 30 minutes or until ready to serve.


I used frozen chicken broth I had on hand, but you could also use one chicken bouillon cube per one cup of water.
You could also substitute dried basil for fresh.

I love a good slow cooker soup recipe and you can find several here or check these out.

A bowl of food on a plate, with Cheese and Soup

Slow Cooker Cheese Tortellini

A bowl of food on a table, with Cooker and Soup

Cream of Mushroom

A bowl of food on a plate, with Soup and Tomato

Taco Soup

It’s all about the memories isn’t it?

What is your favorite holiday tradition?

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  1. 5 stars
    Wonderful comfort food during quarantine! I was so very bummed that my $5 worth of basil got pushed to the back of the fridge and froze so it was unusable, but I was pleasantly surprised by how delicious this was even with just dried basil instead. Followed the recipe except for the crushed tomatoes I used 2 cans of diced tomatoes with italian seasoning (I could have pureed the soup but my one daughter just picked out the small chunks of tomatoes).

    Whole family (including 3 teenagers) liked it so definitely giving it a thumbs up. In fact, my college son said he wants the recipe so he can make it for his housemates in the fall. That’s a big compliment!

  2. I love tomato soup. I am going to have to try this but in my instant pot. I have never been a planner and i always forgot to use tge crockpot. I got an instant pot and LOVE it. Reading this blog i have to say I never had a set menu for Christmas while tge kids were little and we lived 4 hours from family. I wanted to play with the girls. So the got games and coloring books with other stuff and we all spent the day together. The amazing thing was their military father worked much shift work and MANY holidays but in 24 years of active duty service he only worked on Christmas and it was nights. Though the military sent him to Alaska for a year. He came home Christmas. Jas was 15 i think and Helen was 11. He got leave for Christmas. He came home in nearly dec. We finished Christmas shopping early. Thankfully because i had emergency gall bladder surgery Christmas Eve and was in the hospital until New Years eve. A blimp in the road but we worked it out.

  3. I can`t wait to try it… It says winter comfort foods but i`ll make it now (in the summer).
    Who says great tomato soup is just for the winter?