Slow Cooker Meatball Soup with Sweet Potato and Kale

Welcome, food lovers! If you want a hearty, nutritious meal that’s simple to make, this Slow Cooker Meatball, Sweet Potato, and Kale Soup is an excellent choice. With everyday ingredients and a hands-off slow cooker, you get a warm, comforting bowl full of balanced flavor. This recipe is ideal for busy schedules and is a great way to add extra vegetables and protein to your weeknight meals. Read on to learn how to make this satisfying, wholesome soup that’s sure to please the whole family.

Ingredients

• 1 (20 oz) bag frozen turkey meatballs – party-size or kid-size work well.
• 1 tablespoon extra virgin olive oil – for sautéing the mirepoix and adding flavor.
• 1 cup mirepoix – a blend of onion, celery, and carrot, or substitute 1 small onion and 1 stalk celery, chopped.
• 1 clove garlic, minced – adds depth to the broth.
• 2 small sweet potatoes, cut into 1″ cubes – their natural sweetness pairs nicely with the meatballs.
• 1 (8 oz) carton mushrooms, sliced (optional) – optional, for an earthy note.
• Salt and pepper, to taste
• 1 teaspoon sage
• 1 teaspoon oregano
• 1/4 teaspoon cayenne pepper – optional, for a gentle kick.
• 4 cups chicken broth – choose low-sodium for better control of seasoning.
• 1 cup kale, rinsed and chopped
• 2 cups 2% milk – for a creamy finish; see substitutions below for dairy-free options.

Substitution suggestions:

• Use beef or chicken meatballs instead of turkey meatballs.
• Swap 2% milk for almond milk or another plant-based milk for a dairy-free version.
• Replace sweet potatoes with butternut squash for a slightly different flavor and texture.

Instructions

Step 1: Prepare the ingredients

• Peel and cut the sweet potatoes into 1″ cubes. Rinse and chop the kale, removing any tough stems.
• Dice the onion and celery finely if you prefer a smoother broth and more evenly distributed vegetables.

Step 2: Combine in the slow cooker

• Place the frozen meatballs, olive oil, mirepoix, minced garlic, sweet potatoes, mushrooms (if using), and seasonings (salt, pepper, sage, oregano, cayenne) into the slow cooker.
• Pour in the chicken broth so the ingredients are mostly covered.

Step 3: Cook low and slow

• Set the slow cooker to LOW and cook for 6–7 hours. This lets the flavors meld and the sweet potatoes become tender.
• Optional: sauté the garlic and mirepoix in the olive oil for a few minutes before adding them to the slow cooker to deepen the aroma and flavor.

Step 4: Finish with milk and kale

• About 10 minutes before serving, ladle 1/2 cup of hot soup into a bowl and whisk in the 2 cups of milk to temper it.
• Stir the milk mixture and chopped kale into the slow cooker. Cook another 5–10 minutes, until the kale has wilted and the soup is heated through.

Step 5: Serve

• Ladle into bowls and serve warm. A slice of crusty bread or a light green salad make great accompaniments.

1. Use fresh aromatics: Fresh garlic and herbs boost flavor. If using dried herbs, add them earlier so they can rehydrate and release flavor during the long cook.
2. Protect the kale: Add kale near the end of cooking so it stays bright and slightly tender rather than falling apart.
3. Make ahead and freeze: This soup freezes well. Prepare a double batch and freeze portions for quick lunches or weeknight dinners.