This easy Slow Cooker Tomato & Basil Soup With Parmesan Croutons is rich, creamy, and full of comforting flavors. The slow cooker does all the work, making it a fuss-free meal. Crispy Parmesan croutons add the perfect crunch! Use fresh or canned tomatoes for flexibility and enjoy a warm, homemade soup any time of the year.

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Recipe Ingredients

• 850g / 1.9 lbs vine-ripened tomatoes, quartered
• 500ml / 2 cups vegetable stock
• 1 tbsp red pesto
• 1 large red onion, sliced
• 2 cloves garlic, crushed
• 1 tbsp Worcestershire sauce
• A handful of fresh basil leaves
• Sea salt and freshly ground black pepper, to taste

For the Parmesan Croutons:

• ½ baguette
• 1 tbsp olive oil
• A handful of grated Parmesan cheese

How To Make Slow Cooker Tomato & Basil Soup With Parmesan Croutons

1. Prepare the soup: Place the tomatoes in your slow cooker, then add the vegetable stock, red pesto, sliced onion, crushed garlic, and Worcestershire sauce. Cook on low for 2–3 hours.
2. Blend the soup: Stir well, then use a hand blender to blitz the soup until smooth and creamy. If it’s too thick, add a little water to adjust the consistency. Add the basil, season with salt and pepper, and cook for another 1 hour on low.
3. Make the croutons: Slice the baguette into 6 discs, drizzle with olive oil, and sprinkle with grated Parmesan, salt, and pepper.
4. Serve: Ladle the warm soup into bowls and top with the crispy Parmesan croutons. Enjoy!

Recipe Tips

• Use ripe tomatoes: The sweeter and riper your tomatoes, the richer and more flavorful your soup will be. If using canned tomatoes, go for high-quality ones with no added sugar.
• Blend well for a creamy texture: A hand blender works best, but if using a regular blender, let the soup cool slightly before blending to avoid splattering.
• Adjust thickness to your liking: If the soup is too thick, add a little extra vegetable stock or water after blending. If it’s too thin, let it cook uncovered for 15–20 minutes.
• Make extra croutons: These crispy Parmesan croutons add great texture, so make a few extra to enjoy with other dishes like salads or dips.
• Season at the end: Adding salt and pepper after blending ensures the best flavor balance, as cooking can change the taste of the ingredients.

Recipe FAQs and Variations

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