Cajun Chicken Pasta Soup
This Cajun chicken pasta soup takes everything good about a spicy, creamy Cajun chicken pasta and turns it into something you can eat by the spoonful on a cold night. Blackened chicken, bell peppers, and tender ditalini pasta all simmer together in a rich, tomato-flecked broth finished with cream and parmesan.
It’s a genuinely comforting one-pot dinner that comes together in under 40 minutes, with just enough heat from the Cajun seasoning to keep things interesting without overwhelming anyone at the table. Below is the full ingredient list, nutrition info, and a step-by-step walkthrough with a photo for every stage.
Why It Works
- Searing the chicken first and setting it aside, rather than simmering it in the soup the whole time, keeps it from overcooking while the broth comes together.
- Not wiping out the pot between searing the chicken and sautéing the vegetables means all that browned Cajun-seasoned flavor stays in the dish instead of getting rinsed away.
- Keeping the soup at a gentle simmer once the cream goes in prevents it from separating, since a hard boil can cause a cream-based soup to break rather than stay smooth.
Worth Knowing
- Freshly grated parmesan melts more smoothly into the broth than pre-shredded parmesan, which often contains anti-caking agents that resist melting.
- This soup thickens noticeably as it sits, since the pasta keeps absorbing liquid, so leftovers usually need a splash of broth or milk stirred in when reheating.
- Cajun seasoning blends vary in saltiness and heat between brands, so it’s worth tasting the soup partway through and adjusting before adding the full amount called for.
Ingredients
- 1 lb chicken breast, diced
- 2 tbsp Cajun seasoning, divided
- 1 tbsp olive oil
- 1 small onion, diced
- 1 bell pepper, diced
- 3 cloves garlic, minced
- 4 cups chicken broth
- 1 (14.5 oz) can diced tomatoes
- 1 cup ditalini pasta
- 1 cup heavy cream
- 3/4 cup grated parmesan
- Salt and black pepper to taste
- Sliced green onions, for garnish
Step-by-Step Instructions
Sear the Cajun Chicken
Coat the diced chicken evenly with about half the Cajun seasoning, then sear it in a Dutch oven with a bit of oil over medium-high heat until browned on the outside, about 5 to 6 minutes. It doesn’t need to be fully cooked through yet, since it’ll finish simmering in the soup later. Remove the chicken and set it aside once it’s browned — that dark crust is where a lot of the soup’s flavor is going to come from.
Sauté the Onion, Bell Pepper, and Garlic
In the same pot, without wiping it out, add the diced onion and bell pepper and cook for about 4 minutes until they start to soften. Add the garlic and remaining Cajun seasoning and cook for another 30 seconds, just until fragrant. Leaving the pot unwiped matters here — the browned bits left behind from searing the chicken are exactly what these vegetables should be picking up as they cook.
Add the Broth and Diced Tomatoes
Pour in the chicken broth and the can of diced tomatoes with their juices, stirring to combine and scraping up any remaining browned bits from the bottom of the pot. Bring the mixture to a simmer. This is the base the rest of the soup builds on, so don’t rush past it — a few minutes of simmering here lets the tomatoes and broth start coming together before the pasta goes in.
Simmer with the Pasta
Stir in the ditalini pasta and let the soup simmer for 10 to 12 minutes, until the pasta is tender, stirring occasionally so it doesn’t stick to the bottom. Check the pasta a minute or two before the timer’s up, since it’ll continue to soften slightly once the cream goes in and the heat comes down. If the soup looks like it’s thickening up faster than expected, a splash of extra broth keeps it from turning too dense before the pasta finishes cooking.
Stir in the Cream and Parmesan
Return the seared chicken to the pot, then lower the heat and stir in the heavy cream and grated parmesan until the soup turns a lighter orange-pink and the cheese has melted in smoothly. Keep the heat gentle from this point on — boiling a cream-based soup too hard risks it separating rather than staying glossy and cohesive. Let everything warm through together for a couple of minutes.
Serve
Ladle the soup into bowls and top with sliced green onions and an extra sprinkle of parmesan if you like. This soup thickens more as it sits and cools, so leftovers usually need a splash of broth or milk stirred in when reheating to bring the texture back to where it started.
Frequently Asked Questions
How spicy is Cajun chicken pasta soup?
Most Cajun seasoning blends bring warmth rather than overwhelming heat, so this soup is generally mild to moderately spiced rather than fiery. If you want more kick, adding extra Cajun seasoning or a dash of hot sauce at the end is an easy way to adjust it without changing the rest of the recipe.
Can I use a different pasta shape?
Ditalini is traditional here because its small size fits naturally into a spoonful of soup, but small shells, elbow macaroni, or orzo all work well as substitutes. It’s worth avoiding very long noodle shapes, since they’re harder to eat in a soup and tend to clump together as the dish sits.
Why did my soup turn out too thick or too thin?
Pasta continues to absorb liquid as the soup sits, so it’s normal for leftovers to look thicker than when freshly made — a splash of broth or milk when reheating usually fixes this. If the soup seems too thin right after cooking, letting it simmer a few extra minutes uncovered helps it reduce and thicken slightly.
Can I make this soup ahead of time?
This soup keeps for about three days in the fridge, though the pasta will keep absorbing liquid the longer it sits, so it’s worth adding a bit of extra broth when reheating. If you want to make it further ahead, cooking the pasta separately and adding it fresh to each portion keeps the texture more consistent.
What can I use instead of heavy cream?
Half-and-half works as a lighter substitute, though the soup will be noticeably thinner and less rich. A roux made from butter and flour, whisked into the broth before the pasta goes in, is another way to thicken the soup with less dairy if that’s a priority.
Can I make this soup gluten-free?
Yes, swapping in a gluten-free small pasta shape works well, though gluten-free pasta tends to break down faster in soup than regular pasta, so it’s worth checking it a couple of minutes early and possibly cooking it separately to control the texture better.
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