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Creamy keto Italian sausage soup with spinach, zucchini, and sausage served in a pot with a ladle.

Quick Creamy Keto Italian Sausage Soup

Creamy Keto Italian Sausage Soup is a rich, cozy low-carb soup made with savory Italian sausage, garlic, broth, and a creamy finish. It’s quick to make, filling enough for dinner, and perfect for meal prep or busy weeknights.
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Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings: 6
Cuisine: Italian-American
Calories: 420
Ingredients Method Notes

Ingredients
  

  • 1 lb Italian sausage
  • 1 tablespoon olive oil
  • 1 onion
  • 3 cloves garlic
  • 4 cups chicken broth
  • 1 cup heavy cream
  • 4 oz cream cheese
  • 2 cups fresh spinach
  • ½ cup grated Parmesan cheese
  • 1 teaspoon Italian seasoning
  • ½ teaspoon salt
  • ½ teaspoon black pepper
  • ¼ teaspoon crushed red pepper flakes
  • ½ teaspoon paprika
  • 1 cup cauliflower florets
  • 1 zucchini
  • 1 cup mushrooms

Method
 

  1. Heat a large pot over medium heat and cook the Italian sausage, breaking it into crumbles, until browned.
  2. If needed, drain excess grease, leaving a little in the pot for flavor.
  3. Add onion and cook for 3–4 minutes until softened.
  4. Stir in garlic and cook for 30 seconds until fragrant.
  5. Pour in chicken broth and scrape up any browned bits from the bottom of the pot.
  6. Add optional low-carb vegetables (cauliflower, zucchini, or mushrooms) and simmer 8–12 minutes until tender.
  7. Lower the heat and stir in heavy cream.
  8. Add cream cheese (if using) and stir until fully melted and smooth.
  9. Stir in spinach or kale and cook 1–2 minutes until wilted.
  10. Mix in Parmesan cheese, then season with Italian seasoning, salt, pepper, and optional red pepper flakes/paprika.
  11. Serve hot with extra Parmesan on top if desired.

Notes

  • Use hot Italian sausage for extra spice or mild sausage for a classic flavor.
  • Cream cheese makes the soup thicker and extra creamy, but it can be skipped.
  • Add cauliflower, zucchini, or mushrooms for more volume without adding many carbs.
  • Reheat gently on low heat to prevent the cream from separating.