Go Back
Homemade Slow Cooker Tomato Basil Parmesan Soup photo

Slow Cooker Tomato Basil Parmesan Soup

This Slow Cooker Tomato Basil Parmesan Soup is SO COMFORTING! A delightful blend of tomatoes, fresh basil, and creamy Parmesan, simmered to perfection.
Print Recipe Pin Recipe
Prep Time 15 minutes
Cook Time 6 hours
Total Time 6 hours 15 minutes
Servings: 6 servings
Course: Main Course, Soup
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

For the Soup:
  • 2 cans diced tomatoes 14-ounce, with the juice
  • 1 cup finely diced carrots
  • 1 cup finely diced onions
  • 1 cup finely diced celery
  • 1 teaspoon dried oregano or 1 tablespoon fresh chopped oregano
  • 1 tablespoon dried basil or ½ cup fresh chopped basil
  • 4 cups chicken broth
  • ½ cup butter
  • ½ cup flour
  • 1 cup Parmesan cheese
  • 1 cup half and half
  • 1 teaspoon salt
  • ½ teaspoon pepper

Equipment

  • Slow Cooker
  • Cutting board and knife
  • Measuring cups and spoons
  • Whisk
  • Blender (Optional)

Method
 

Instructions:
  1. Start by finely dicing the carrots, onions, and celery. This mirepoix will provide a wonderful base for your soup.
  2. In your slow cooker, add the diced tomatoes along with their juice, diced carrots, onions, celery, oregano, basil, and chicken broth. Stir well to combine.
  3. Set your slow cooker to low and let the soup cook for about 6-8 hours. If you're short on time, you can set it to high for 3-4 hours.
  4. In a saucepan, melt the butter over medium heat. Once melted, whisk in the flour and cook for about 2 minutes until bubbly and golden.
  5. Gradually add a ladleful of the hot soup broth to the roux while whisking continuously to create a smooth mixture. Pour this mixture back into the slow cooker and stir well.
  6. About 30 minutes before serving, stir in the half and half and Parmesan cheese. Allow the soup to warm through and the cheese to melt.
  7. Before serving, taste your soup and add salt and pepper according to your preference.
  8. Ladle the soup into bowls. You can garnish with additional Parmesan cheese or fresh basil if desired.

Notes

  • For a creamier texture, consider blending a portion of the soup before adding the cheese and cream.
  • This soup freezes beautifully; leave out the cream until you reheat it.
  • Feel free to adjust the herbs based on your taste.