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Creamy slow cooker zuppa toscana soup with Italian sausage, tender potatoes, fresh kale, and Parmesan cheese garnish in white bowl

Slow Cooker Zuppa Toscana Soup

This hearty slow cooker zuppa toscana soup is loaded with Italian sausage, tender potatoes, and fresh kale in a creamy broth. Brown the sausage, toss everything in your slow cooker, and let it cook for 4-5 hours on low for a comforting meal that tastes even better the next day.
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Prep Time 20 minutes
Cook Time 4 hours 30 minutes
Total Time 4 hours 50 minutes
Servings: 5 portions
Course: Dinner, Main Course
Cuisine: American, Italian
Calories: 280
Ingredients Equipment Method Notes

Ingredients
  

  • 13.2 oz Italian sausage Mild or spicy, casings removed; brown until no pink remains
  • 1 small onion Diced into 1/2-inch pieces
  • 2 cloves garlic Freshly minced
  • 3 cup low-sodium chicken broth
  • 1.5 lb russet potatoes Scrubbed clean, cut into 1-inch chunks; starchy variety recommended
  • 0.75 tsp salt Adjust to taste at end of cooking
  • 0.25 tsp black pepper Freshly ground preferred
  • 1 pinch red pepper flakes For mild heat; adjust to taste
  • 2 cup fresh kale Stems removed, roughly chopped; add during last 15-20 minutes on Low
  • 0.75 cup heavy cream Room temperature preferred; add during final cooking minutes to prevent curdling
  • 0.25 cup grated Parmesan cheese Freshly grated preferred; plus extra for serving

Equipment

  • Large frying pan
  • 4-6 quart slow cooker
  • Cutting board and knife

Method
 

  1. In a large frying pan, brown the Italian sausage over medium-high heat, breaking it into small crumbles as it cooks. Add the diced onion and cook together for 4-5 minutes until the sausage is nicely browned and the onions are softened. Add the minced garlic and cook for an additional minute until fragrant.
  2. Transfer the browned sausage mixture to your 4-6 quart slow cooker. Add the chicken broth, chopped potatoes, salt, pepper, and red pepper flakes. Stir everything together until combined evenly.
  3. Set your slow cooker to Low for 4-5 hours (preferred for better flavor development) or High for 2-2.5 hours. The soup is ready when potatoes pierce easily with a fork. Avoid lifting the lid frequently, as each peek can add 15-20 minutes to cooking time.
  4. During the last 15-20 minutes on Low setting (or final 5-10 minutes on High setting), gently stir in the chopped kale, room-temperature heavy cream, and grated Parmesan cheese. Stir slowly to incorporate the cream evenly and prevent curdling.
  5. Taste your soup and adjust seasonings as needed. Add more salt, pepper, or red pepper flakes based on your preference. Your slow cooker zuppa toscana soup is ready to serve warm.

Notes

Browning the sausage first develops deeper flavors and prevents a greasy soup. Use room-temperature cream to prevent curdling. Add kale during the last 30 minutes to prevent it from becoming mushy. For freezing, store the base without cream and kale in freezer-safe containers for up to 3 months. Thaw overnight and add fresh cream and kale while reheating. Russet potatoes will break down slightly and naturally thicken the soup; use gold potatoes if you prefer firmer texture.