Slow-Cooker Tomato Basil Soup with Parmesan Crisps

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A vibrant tomato soup simmered until the flavors meld, with fresh basil and a hint of Parmesan for depth. The optional crispy Parmesan toppers add a fun texture that makes this soup irresistible to children. This italian-inspired slow cooker ready in about 260 minutes pairs (14.5 oz) cans diced tomatoes, low-sodium chicken broth, fresh basil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 250 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 4.1 (12 ratings) Prep: 20 min Cook: 240 min Serves 4 Italian cuisine 250 cal/serving
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Ingredients

Instructions

  1. Step 1: In slow cooker, combine 2 (14.5 oz) cans diced tomatoes, 1 cup low-sodium chicken broth, and 1/4 cup fresh basil.
  2. Step 2: Stir in 1/4 cup grated Parmesan cheese, 1/4 tsp salt, and 1/8 tsp black pepper.
  3. Step 3: Cover and cook on low for 4 hours until flavors meld.
  4. Step 4: While soup cooks, prepare crisps: preheat oven to 375°F. Whisk 1/2 cup grated Parmesan cheese with 1/4 tsp salt. Drop 1 teaspoon mixture onto parchment-lined sheet.
  5. Step 5: Flatten slightly with spoon. Bake 5-7 minutes until golden and crisp.
  6. Step 6: Serve soup hot with Parmesan crisps sprinkled on top.

Frequently asked questions

How long does Slow-Cooker Tomato Basil Soup with Parmesan Crisps take to make?

Total time is about 260 minutes (20 min prep + 240 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Slow-Cooker Tomato Basil Soup with Parmesan Crisps?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep (14.5 oz) cans diced tomatoes from drying out.

Can I substitute ingredients in Slow-Cooker Tomato Basil Soup with Parmesan Crisps?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Slow-Cooker Tomato Basil Soup with Parmesan Crisps for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Slow-Cooker Tomato Basil Soup with Parmesan Crisps?

Italian slow cooker like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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