Slow Cooker Zuppa Toscana with Sausage and Kale

Why You’ll Love This Recipe

• Hands-off comfort: the slow cooker does the simmering while you live your life.
• Cozy, restaurant-familiar flavors with simple, affordable ingredients.
• Creamy yet bright, with tender potatoes, crumbled sausage, and ribbons of kale.
• Make-ahead and freezer-friendly (with an easy dairy tweak).

Grocery List

• Produce: 1 yellow onion, 4 garlic cloves, 1 1/2 lb potatoes (russet or Yukon Gold), 1 bunch curly kale
• Dairy: Heavy cream, Parmesan (for serving)
• Pantry: Italian sausage, low-sodium chicken broth, olive oil, kosher salt, black pepper, crushed red pepper flakes (optional), bacon (optional)

Full Ingredients

For the Soup

• 1 tbsp olive oil
• 1 1/4 lb (560 g) Italian sausage, casings removed (use hot sausage for a spicier soup)
• 1 medium yellow onion, diced (about 1 1/2 cups)
• 4 garlic cloves, minced
• 1 1/2 lb (680 g) potatoes, scrubbed and sliced into 1/4-inch half-moons (or 3/4-inch cubes)
• 6 cups (1.4 L) low-sodium chicken broth
• 1/2 tsp crushed red pepper flakes (optional)
• 1 1/4 tsp kosher salt, plus more to taste
• 1/2 tsp freshly ground black pepper
• 1 cup (240 ml) heavy cream
• 4 packed cups curly kale, stems removed and leaves chopped bite-size (about 5 oz/140 g)

Optional Finish & Garnish

• 3 slices bacon, cooked crisp and crumbled
• 1/3–1/2 cup freshly grated Parmesan
• Extra olive oil for drizzling and a pinch more red pepper flakes

Step-by-Step Instructions

Step 1: Brown the sausage

Heat the olive oil in a large skillet over medium-high heat until shimmering. Add the Italian sausage and cook, breaking it into crumbles, until browned with some crispy edges, 6–8 minutes. Spoon off excess fat if more than about 1 tablespoon remains.

Step 2: Soften aromatics

Add the diced onion to the skillet and cook until translucent, about 3 minutes. Stir in the minced garlic and cook just until fragrant, 30 seconds. Turn off the heat.

Step 3: Load the slow cooker

Place the sliced potatoes in the slow cooker. Transfer the sausage, onion, and garlic mixture on top. Pour in the chicken broth, add crushed red pepper flakes (if using), kosher salt, and black pepper. Deglaze the hot skillet with 1/2 cup broth (scrape up the browned bits) and pour that flavorful liquid into the slow cooker.

Step 4: Slow cook

Cover and cook on LOW for 6 hours (about 200°F/93°C inside the pot) or on HIGH for 3 1/2 hours, until the potatoes are completely tender and the flavors have melded. If your slow cooker has a “Keep Warm” setting, it typically holds around 165°F/74°C.

Step 5: Finish with cream and kale

Stir in the heavy cream and chopped kale. Switch to HIGH (if not already) and cook, covered, for 10–15 minutes, until the kale is wilted and the soup is steaming. Avoid boiling vigorously after adding cream to prevent separation.

Step 6: Adjust seasoning and texture

Taste and add more salt or pepper as needed. For a slightly thicker, chowder-like texture, lightly mash a few potato slices against the side of the crock and stir.

Step 7: Serve

Ladle into warm bowls. Garnish with grated Parmesan and a sprinkle of bacon crumbles, plus a light drizzle of olive oil and a pinch of red pepper flakes if you like a little heat. Serve immediately.

Pro Tips

• Slice potatoes evenly (1/4 inch) so they become tender at the same time.
• Deglazing the skillet with a splash of broth captures all the savory browned bits—do not skip.
• Add the cream and kale at the end to keep the broth silky and the greens vibrant.
• If using bacon, cook it first until crisp; use 1 tbsp bacon drippings in place of the olive oil for extra richness.
• Prefer a lighter soup? Replace 1/2 cup of cream with 1/2 cup whole milk, but add it off heat to prevent curdling.

Variations

• Spicy Zuppa: Use hot Italian sausage and increase red pepper flakes to 3/4 tsp.
• Dairy-Free: Swap heavy cream for 3/4 cup unsweetened full-fat coconut milk; add with the kale.
• Extra Veg: Add 1 cup diced fennel or 2 diced carrots with the onions for subtle sweetness and body.

Storage & Make-Ahead

Refrigerate leftovers in an airtight container for up to 4 days. Reheat gently on the stovetop over medium heat until steaming (about 170–180°F), avoiding a hard boil after the cream is added. For freezing, the best method is to freeze the soup before adding cream and kale for up to 3 months. Thaw overnight in the fridge, reheat to a simmer, then add cream and kale and cook 10–15 minutes before serving. Prep-ahead option: brown sausage with onions and garlic, slice potatoes, and store all components (with broth) in the insert in the fridge up to 24 hours; let the insert warm on the counter 20–30 minutes before placing in the heated base to avoid thermal shock.

Nutrition (per serving)

Approximate: 560 calories; 29 g protein; 39 g fat; 31 g carbohydrates; 3 g fiber; 1,050 mg sodium. Values will vary with sausage, broth, and optional garnishes.