If you’ve got a hungry crowd and about 45 minutes, this one pot Cajun shrimp pasta for a crowd is exactly what you want. It’s a big pot of creamy, spicy Cajun-style pasta loaded with shrimp, andouille sausage, and the classic bell pepper and onion base. Everything cooks in one Dutch oven, including the pasta, so cleanup stays sane even if you’ve got kids running laps around the kitchen. If you’re pressed for time, chop the veggies and measure the spices earlier in the day so you’re basically just sautéing and simmering when people show up. I first made a version of this for a game night, and the pot was scraped clean.
Ingredients
Serves 8–10 (good for a generous crowd; scale down by half for a smaller group)
For the Cajun seasoning mix (or use your favorite store-bought blend):
- 2 tbsp smoked paprika
- 1 tbsp sweet paprika (or use all smoked if that’s what you have)
- 1 tbsp garlic powder
- 2 tsp onion powder
- 2 tsp dried oregano
- 2 tsp dried thyme
- 2–3 tsp kosher salt, to taste
- 1½–2 tsp freshly ground black pepper
- ½–1 tsp cayenne pepper (adjust heat)
For the pasta pot:
- 3 tbsp olive oil
- 450 g / 1 lb andouille sausage, sliced into ½ cm / ¼ inch rounds (smoked kielbasa works; flavor is less peppery but still good)
- 1.3–1.4 kg / 3 lbs large raw shrimp, peeled and deveined, tails off if you like (about 50–60 shrimp)
- 1 large yellow onion, finely chopped
- 2 green bell peppers, sliced or diced
- 2 celery stalks, finely chopped (optional but adds that Cajun “trinity” base)
- 5 cloves garlic, minced
- 2 tbsp of the Cajun seasoning mix (for the shrimp)
- 1 tbsp of the Cajun seasoning mix (for the pot to start; more to taste later)
- 960 g / 2 lbs short pasta, like penne or rotini
- 1.4 L / 6 cups low-sodium chicken broth (or 4 cups broth + 2 cups water)
- 480 ml / 2 cups heavy cream (half-and-half works but sauce will be thinner)
- 1 can (400 g / 14.5 oz) diced tomatoes, drained (fire-roasted if possible)
- 60 g / ½ cup grated Parmesan cheese, plus more for serving
- Juice of 1 lemon, plus extra wedges for serving
- 15 g / ½ cup chopped fresh parsley or green onions, for garnish
Heads up: Don’t bother with low-fat cream cheese or half a block of this and that here. You want heavy cream and a decent hit of Parmesan so the sauce clings to all that pasta.
Step-by-Step One Pot Cajun Shrimp Pasta for a Crowd
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Mix the Cajun seasoning.
In a small bowl, stir together the smoked paprika, sweet paprika, garlic powder, onion powder, oregano, thyme, salt, pepper, and cayenne. Taste a tiny pinch so you know how spicy and salty your blend is before it hits the pot. -
Season the shrimp.
Pat the shrimp dry with paper towels (this helps them sear instead of steam). Toss them in a large bowl with 2 tbsp of the Cajun seasoning until coated. Set aside while you start the pot. -
Brown the sausage.
Set a large heavy Dutch oven or wide stockpot over medium-high heat and add the olive oil. When it shimmers, add the andouille in a single layer. Cook, stirring occasionally, until browned and some of the fat has rendered, about 5–7 minutes. Scoop the sausage onto a plate, leaving the fat in the pot. -
Quickly sear the shrimp.
In the same pot, add half the shrimp in a single layer. Cook just until they start to turn opaque and get light golden spots, about 1–2 minutes per side. Don’t cook them through; they’ll finish later. Transfer to the plate with the sausage and repeat with the remaining shrimp. If the bottom looks like it’s getting dark, drop the heat a bit. -
Soften the vegetables.
Lower the heat to medium. If the pot looks dry, add another splash of oil. Add the onion, bell peppers, and celery with a small pinch of salt. Cook, stirring and scraping up any browned bits, until the vegetables are softened and the onions are starting to turn golden, about 6–8 minutes. -
Add garlic and bloom the spices.
Stir in the garlic and cook until fragrant, about 30 seconds. Sprinkle in 1 tbsp of the Cajun seasoning mix and stir for another 30 seconds so the spices hit the heat and smell toasty. If it smells sharp or a little bitter, your heat’s too high—turn it down. -
Build the sauce base.
Pour in the chicken broth and scrape the bottom of the pot well. Add the drained diced tomatoes and heavy cream. Stir to combine, then taste and add more Cajun seasoning and/or salt if it tastes flat. You want it a little saltier than you think, since you’re about to add a lot of pasta. -
Add the pasta.
Bring the pot up to a gentle boil, then add the uncooked pasta. Stir well so nothing sticks together. Drop the heat to medium-low and simmer uncovered, stirring every couple of minutes to keep the pasta from sticking to the bottom. Cook until the pasta is just shy of al dente, usually 10–12 minutes depending on shape and brand. -
Adjust thickness.
If the liquid level dips below the pasta before it’s cooked, splash in a bit more broth or hot water, about 120 ml / ½ cup at a time. The sauce should look loose and soupy at this point. That’s fine. It thickens as the starch releases and as it cools. -
Finish the pasta with cheese and lemon.
When the pasta is al dente, turn the heat down to low. Stir in the Parmesan a handful at a time, along with the lemon juice. Taste again. If it needs more heat, add a pinch of cayenne or another teaspoon of Cajun seasoning. For more tang, squeeze in extra lemon. -
Reunite shrimp and sausage.
Tip the browned sausage and shrimp (plus any juices) back into the pot. Fold gently so you don’t break the shrimp. Let everything heat together on low for 2–3 minutes, just until the shrimp are opaque and firm. Don’t walk away here; overcooked shrimp turn rubbery fast. -
Rest and garnish.
Take the pot off the heat and let it sit, uncovered, for about 5 minutes. The sauce will thicken slightly and cling better to the pasta. Sprinkle over the chopped parsley or green onions right before serving.
One thing — if you’re serving buffet-style, keep a lid nearby. Pop it on loosely between people scooping to keep the pasta from drying out.
What to Expect
You’ll end up with a big, heavy pot of pasta in a rosy, slightly thick sauce that coats rather than drowns everything. The shrimp should be just cooked, still juicy, with a bit of spice on the outside. Sausage pieces are smoky and a little chewy, which is great against the tender pasta.
Flavor-wise, it leans creamy and savory with a slow-building heat instead of a blow-your-head-off burn. If you used fire-roasted tomatoes and lemon, you’ll get a nice little brightness that keeps it from feeling too heavy.
Ways to Change It Up
If you need this to be meatless, skip the sausage and double up on the peppers and celery. Use vegetable broth instead of chicken, and keep the shrimp or swap in mushrooms sautéed until deeply browned. It won’t be classic anything, but it’s still a solid one-pot pasta.
You can also lean into the smoke and heat: use all smoked paprika in the seasoning blend, choose the spiciest andouille you can find, and don’t be shy with the cayenne. I like to finish that version with a bit more lemon and a handful of chopped green onions so it doesn’t taste flat.
For a lighter version, use half-and-half instead of cream and drop the Parmesan to ¼ cup. The sauce will be thinner and won’t cling quite as much, but it still works. I wouldn’t go lower-fat than that or the sauce gets grainy and sad.
Serving and Storage
Set the pot right on the table or buffet with a big spoon and let people scoop. This is hearty enough to be the entire meal, but a crisp side salad with a sharp vinaigrette cuts through the richness nicely. Garlicky roasted green beans or simple sautéed zucchini also work if you want a warm vegetable on the side.
If you want to nod toward Cajun and Creole dinners, you can add a pot of white rice and a simple corn dish like maque choux; there’s good background on that dish and its roots in Native American and Creole cooking here: maque choux history and context.
Leftovers keep in an airtight container in the fridge for 3–4 days. The pasta will keep soaking up sauce, so expect it to be softer on day two. To reheat, add a splash of water or broth and warm gently on the stove over low heat, stirring often, or microwave in short bursts, stirring between. The shrimp will be a little firmer after reheating, but still totally fine for lunch.
Common Questions
Can I make this ahead for a party?
You can cook it a few hours ahead, keep it covered in the pot, and reheat gently with a bit more broth right before serving. I wouldn’t fully cook the shrimp if you’re doing this—pull them off the heat when they’re just turning opaque, then let them finish as you rewarm the pasta.
What kind of shrimp works best?
Large or extra-large raw shrimp hold up best to cooking in a crowd-sized pot. Smaller shrimp overcook in a blink and get lost in the pasta. Frozen shrimp are fine; just thaw them overnight in the fridge and pat them very dry before seasoning.
Is there a way to make this less spicy for kids?
Sure. Cut the cayenne down to a tiny pinch in the seasoning blend and use a mild store-bought Cajun seasoning if you like. Then put extra Cajun seasoning or hot sauce on the table for anyone who wants more heat.
Can I use another pasta shape?
Yes. Short shapes like penne, rigatoni, rotini, or fusilli all work well. Avoid very tiny shapes (ditalini, orzo) because they can overcook quickly and turn the pot mushy. Whatever shape you choose, start checking for doneness a couple of minutes earlier than the package suggests.
How do I scale this down?
Halve everything for about 4–5 portions. Use the same size pot so the pasta has room to move, and check the pasta a minute or two earlier since a smaller volume of liquid often cooks it slightly faster.
If you make this once, you’ll get a feel for how saucy you like it. Next round, tweak the broth or cream up or down a bit and make it yours. And if you try it with different sausage or add-ins—corn, extra peppers, whatever’s in your fridge—tell me what you did; I’m always curious about how these big one-pot meals evolve in real kitchens.
One Pot Cajun Shrimp Pasta for a Crowd
Equipment
- Large heavy Dutch oven or wide stockpot
- Small bowl (for seasoning mix)
- Large bowl (for seasoning shrimp)
- Wooden spoon or spatula
- Plate (for holding browned sausage and shrimp)
- Paper towels
Ingredients
Cajun seasoning mix
- 2 tbsp smoked paprika
- 1 tbsp sweet paprika or use all smoked
- 1 tbsp garlic powder
- 2 tsp onion powder
- 2 tsp dried oregano
- 2 tsp dried thyme
- 2–3 tsp kosher salt to taste
- 1½–2 tsp freshly ground black pepper
- ½–1 tsp cayenne pepper adjust heat
For the pasta pot
- 3 tbsp olive oil
- 450 g andouille sausage sliced into 1/2 cm (1/4 inch) rounds; smoked kielbasa works
- 1.3–1.4 kg large raw shrimp peeled and deveined (tails off if you like)
- 1 large yellow onion finely chopped
- 2 green bell peppers sliced or diced
- 2 celery stalks finely chopped (optional)
- 5 cloves garlic minced
- 2 tbsp Cajun seasoning mix for the shrimp
- 1 tbsp Cajun seasoning mix for the pot to start; more to taste later
- 960 g short pasta (penne or rotini)
- 1.4 L low-sodium chicken broth or 4 cups broth + 2 cups water
- 480 ml heavy cream half-and-half works but sauce will be thinner
- 1 can diced tomatoes drained (400 g / 14.5 oz); fire-roasted if possible
- 60 g grated Parmesan cheese plus more for serving
- 1 lemon juice, plus extra wedges for serving
- 15 g fresh parsley or green onions chopped, for garnish
Instructions
- Mix the Cajun seasoning. In a small bowl, stir together the smoked paprika, sweet paprika, garlic powder, onion powder, oregano, thyme, salt, pepper, and cayenne. Taste a tiny pinch so you know how spicy and salty your blend is before it hits the pot.
- Season the shrimp. Pat the shrimp dry with paper towels. Toss in a large bowl with 2 tbsp of the Cajun seasoning until coated. Set aside while you start the pot.
- Brown the sausage. Heat a large heavy Dutch oven or wide stockpot over medium-high and add the olive oil. Add the andouille in a single layer and cook, stirring occasionally, until browned and fat has rendered, about 5–7 minutes. Scoop onto a plate, leaving the fat in the pot.
- Quickly sear the shrimp. In the same pot, sear half the shrimp in a single layer until they start turning opaque with light golden spots, about 1–2 minutes per side. Transfer to the plate and repeat with remaining shrimp.
- Soften the vegetables. Lower heat to medium. If dry, add another splash of oil. Add onion, bell peppers, and celery with a pinch of salt and cook, stirring and scraping browned bits, until softened and onions begin to turn golden, about 6–8 minutes.
- Add garlic and bloom the spices. Stir in garlic and cook until fragrant, about 30 seconds. Add 1 tbsp Cajun seasoning mix and stir 30 seconds more until toasty.
- Build the sauce base. Pour in chicken broth and scrape the bottom well. Add drained diced tomatoes and heavy cream. Stir, then taste and adjust Cajun seasoning and/or salt.
- Add the pasta. Bring to a gentle boil, add uncooked pasta, and stir well. Reduce to medium-low and simmer uncovered, stirring every couple minutes, until pasta is just shy of al dente, 10–12 minutes.
- Adjust thickness. If liquid dips below the pasta before it’s cooked, add more broth or hot water, about 120 ml (1/2 cup) at a time. Sauce should look loose; it thickens as starch releases and as it cools.
- Finish the pasta with cheese and lemon. When pasta is al dente, reduce heat to low. Stir in Parmesan a handful at a time, then add lemon juice. Taste and adjust heat with cayenne or more Cajun seasoning if needed.
- Reunite shrimp and sausage. Add sausage and shrimp (plus any juices) back to the pot. Fold gently and warm on low 2–3 minutes, just until shrimp are opaque and firm.
- Rest and garnish. Remove from heat and rest uncovered about 5 minutes. Garnish with chopped parsley or green onions right before serving.
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