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4.7 from 87 votes

Slow Cooker Tomato Basil Soup

Balanced, flavorful, and enjoyable—this recipe has it all.

Prep Time
20 mins
Cook Time
7 hrs
Total Time
7 hrs 20 mins
Servings: 6 -8 servings
Course: Soup
Cuisine: American

Ingredients

  • 2 cans cans (14-ounces each) petite diced tomatoes undrained
  • 1 cup finely diced celery
  • 1 cup finely diced carrots
  • 1 cup finely diced onions
  • 1 teaspoon dried oregano
  • 1 tablespoon dried basil
  • 4 cups low-sodium chicken broth
  • 1 bay leaf
  • ¼ cup butter
  • ½ cup flour
  • 1 cup freshly grated Parmesan cheese
  • 2 cups fat free or regular half-and-half lightly warmed
  • 1 teaspoon salt
  • ½ teaspoon black pepper
  • Croutons for serving

Instructions

    Cup of Yum
  1. In a 5-quart slow cooker, combine the tomatoes, celery, carrots, onions, oregano, basil, broth, and bay leaf. Cover and cook on low for 5-7 hours until the vegetables are tender.
  2. About 45 minutes before serving, melt the butter over low heat in a medium saucepan. Add the flour and cook, stirring constantly, until the mixture is golden, about 3 minutes. The mixture will be crumbly, but that's ok.
  3. Whisking constantly, slowly ladle in 1 cup (or a ladleful) of the hot soup from the slow cooker. Whisk until smooth and bubbly. Add another cup or ladleful and stir again until smooth. Add another cup or two and stir until smooth.
  4. Stir the creamy, hot mixture back into the slow cooker. Add the Parmesan cheese, half-and-half, salt and pepper, adding more salt and pepper if needed.
  5. Cover and cook on low for 30 minutes until ready to serve (at this point, you can blend for smoother texture, if desired). Serve with homemade croutons, if desired (and trust me, you'll want to desire it).

Notes

  • Tomatoes: you can use regular diced tomatoes if you don't have or can't find petite diced, but if you have the option, go for the petite diced. The smaller size of the tomatoes meshes better with the finely diced vegetables.

Nutrition Information

Serving 1 Serving Calories 370kcal (19%) Carbohydrates 30g (10%) Protein 16g (32%) Fat 23g (35%) Saturated Fat 14g (70%) Cholesterol 62mg (21%) Sodium 1013mg (42%) Fiber 5g (20%) Sugar 9g (18%)

Nutrition Facts

Serving: 6-8 servings

Amount Per Serving

Calories

% Daily Value*

Serving 1 Serving
Calories 370kcal 19%
Carbohydrates 30g 10%
Protein 16g 32%
Fat 23g 35%
Saturated Fat 14g 70%
Cholesterol 62mg 21%
Sodium 1013mg 42%
Fiber 5g 20%
Sugar 9g 18%

* Percent Daily Values are based on a 2,000 calorie diet.