
This rich Cajun potato soup blends Louisiana's bold tastes with cozy potato soup comfort. Spicy andouille sausage, soft potatoes, and a thick, smooth base come together for a warming meal that works great for busy weeknights or casual get-togethers.
I whipped up this soup one cold fall night when I wanted something with a bit of heat. After trying the first bite, my family immediately called it their new favorite, and now we make it whenever it's cold outside or we're in the mood for some Southern cooking.
Ingredients
- Andouille sausage: This smoky Cajun pork sausage brings authentic taste and spiciness. Try to find one that's got visible spices and feels firm when you touch it.
- Cajun seasoning: This mix forms the flavor foundation. Good quality blends should contain several different herbs and spices.
- Russet potatoes: They're starchy enough to help thicken your soup naturally while staying intact. Go for firm ones without any green patches.
- Heavy whipping cream: This makes the soup incredibly smooth and satisfying. Don't substitute with lighter options for best results.
- Mild cheddar cheese: Adds a nice flavor boost without fighting against the Cajun spices. Grate it yourself instead of buying pre-shredded for better melting.
- Fresh vegetables: Onions, celery, and bell peppers make up the essential Cajun cooking base that gives everything a fragrant start.
Step-by-Step Instructions
- Brown the Sausage:
- Put vegetable oil in a big pot over medium heat until it's hot and shiny. Toss in your sliced andouille sausage and cook about 3-4 minutes, giving it a stir now and then until you see a nice brown crust forming. This step really matters because it lets all those smoky flavors out into the oil. Take the sausage out but keep all those tasty bits in the pot.
- Sauté the Holy Trinity:
- Throw your chopped onion, celery, and red bell pepper into that same pot with all the sausage drippings. Cook them on medium for 5-8 minutes, stirring often until everything softens up and the onions look clear. Add your chopped garlic during the final minute, but watch it closely so it doesn't burn and make things taste bitter. You want soft veggies that aren't browned.
- Build the Soup Base:
- Shake your Cajun seasoning, salt, black pepper, paprika, and cayenne right onto those veggies and mix everything together. This quick cooking of the spices makes their flavors pop. Pour in your chicken broth and add the potato cubes, giving it all a good stir. Turn the heat down to a gentle bubble and let it cook without a lid for 20-25 minutes, or until you can easily stick a fork through the potatoes.
- Create the Creamy Finish:
- Put the browned sausage back in the pot, pour in your heavy cream and add the shredded cheddar. Let it bubble gently for another 5 minutes, stirring now and then to help the cheese melt smoothly. The soup will get a bit thicker as it cooks. Give it a taste and add more seasoning if needed before you serve it with some fresh parsley on top.

The andouille sausage really makes this dish special. I first tried it during a trip to New Orleans a few years back, and I've been cooking with it ever since. The way it fills the broth with smoky, spicy goodness creates a flavor you just can't get from anything else. My family can tell what kind of day I've had by how much cayenne ends up in the pot!
Spice Level Management
You can totally control how hot this Cajun potato soup turns out. Want something milder that everyone will enjoy? Just cut back on the cayenne and pick a more gentle Cajun seasoning. If you love heat, add more of both and maybe look for spicier andouille. The cream and cheese help cool things down, so you'll still get a nice balance even with extra spice. That's what's so great about this soup - you can adjust the heat but still keep all those authentic Cajun flavors.
Make-Ahead Options
This soup actually tastes better the next day, which makes it perfect for planning ahead. You can make it a day early and keep it in the fridge so all the flavors can mix together overnight. When you're ready to eat it again, warm it up slowly on medium-low heat and stir it now and then so it doesn't burn. If it's gotten too thick while sitting, just add a splash of chicken broth or cream to thin it out. It's so nice having this ready to go in your fridge after a long day - makes the cooking time totally worth it.

Serving Suggestions
Make this soup into a full meal by pairing it with warm, crusty French bread for dipping. The mix of crunchy bread outside and smooth soup creates an amazing texture combo that makes everything taste better. For something lighter on the side, try a basic green salad with vinaigrette to cut through the richness. Having friends over? Serve the soup in hollowed-out bread bowls for a fancy touch that doesn't take much extra work. The bread soaks up all that tasty broth while adding another layer to your meal.
Frequently Asked Questions
- → Can I swap the sausage for another kind?
Absolutely, feel free to replace andouille with smoked bratwurst, kielbasa, or another variety of smoked sausage. Just keep in mind the spice level might differ.
- → How can I improvise Cajun seasoning?
You can whip up your own mix from spices you probably have: combine paprika, garlic powder, cayenne, black pepper, and salt. Adjust amounts for your desired spice level.
- → Does this soup freeze well?
Yes! Let it cool completely, then portion it into freezer-safe containers. It stays good in the freezer for up to 2-3 months. Thaw in the fridge and reheat when ready.
- → Which potatoes are best for this soup?
Russet potatoes are perfect since they soak up flavors and have a great texture. Yukon gold or red potatoes work too if that's what you've got.
- → How can I make it less spicy?
Dial back the cayenne, paprika, and Cajun seasoning. Use a mild sausage instead of andouille for a gentler kick.
- → Can I make a non-dairy version?
Definitely! Replace heavy cream with coconut cream or plant-based alternatives and skip the cheese, or use dairy-free substitutes.