
This spicy, hearty Cajun potato soup has been my cold-weather comfort food for years, combining the rich flavors of Louisiana with creamy potatoes and smoky sausage in every spoonful.
I first made this soup during a particularly cold winter when I was craving something with a kick. The moment my family tasted it, they demanded I add it to our regular rotation. Now it appears on our table at least twice a month during fall and winter.
Ingredients
- Andouille sausage links: Brings authentic Cajun flavor and hearty texture. Look for high-quality smoked varieties for the best flavor.
- Butter and olive oil: Work together as the perfect fat combination for sautéing. The butter adds richness while the oil prevents burning.
- Fresh garlic cloves: Provide essential aromatic foundation. Always use fresh rather than pre-minced for superior flavor.
- Crushed red pepper flakes: Add customizable heat. Start with less if you prefer milder spice.
- Onion, celery, and red pepper: Form the classic Cajun trinity. Choose firm vegetables with vibrant color.
- Chicken broth: Serves as the flavorful base. Use low-sodium to better control salt levels.
- Cajun seasoning: Brings authentic Louisiana flavor. Look for versions with less salt so you can adjust separately.
- Smoked paprika: Adds depth and subtle smokiness. Spanish varieties offer the most complex flavor.
- Russet potatoes: Provide hearty substance and creamy texture. Choose potatoes of similar size for even cooking.
- Heavy whipping cream: Creates luxurious richness. Full-fat version works best here.
- Cheddar and Parmesan cheeses: Add nutty complexity and thickening power. Freshly grated melts much better than pre-shredded.
- Fresh parsley: Brightens the finished dish with color and fresh flavor. Italian flat-leaf variety has more robust flavor than curly.
Step-by-Step Instructions
- Brown the Sausage:
- Heat your Dutch oven over medium heat and add the sliced andouille sausage. Cook for 3-5 minutes until the edges develop a delicious golden-brown color. This step creates amazing flavor compounds that will infuse the entire soup. Remove the sausage to a bowl and set aside.
- Create the Flavor Base:
- Add butter and olive oil to the same pot over medium heat. When the butter has melted, add the garlic and red pepper flakes, stirring constantly for a full minute. This process blooms the spices and garlic, releasing their essential oils into the fat.
- Sauté the Trinity:
- Add the chopped onion, red pepper, and celery to the pot. Cook for 5-7 minutes, stirring occasionally until the vegetables soften and become slightly translucent. Take your time here; the vegetables should not brown but rather become tender and aromatic.
- Build the Broth:
- Pour in the chicken broth and add the Cajun seasoning, smoked paprika, and salt. Stir well to incorporate all the spices and bring the mixture to a rolling boil. This step helps marry all the flavors together before adding the potatoes.
- Cook the Potatoes:
- Add the cubed potatoes to the boiling broth, then reduce the heat to maintain a gentle simmer. Cook uncovered for 15-18 minutes, stirring occasionally until the potatoes are fork-tender but not falling apart. Test a larger piece to ensure they're cooked through.
- Create Creaminess:
- Reduce the heat to low to prevent curdling, then slowly stir in the heavy cream and both cheeses. Stir continuously until all the cheese has completely melted, creating a velvety smooth texture. The soup will thicken slightly as the cheese incorporates.
- Finish the Soup:
- Return the browned sausage to the pot along with the fresh parsley. Stir gently to distribute everything evenly and heat through for about 2-3 minutes. Taste and adjust seasonings if needed before serving.

The andouille sausage is truly the star ingredient in this recipe. I discovered this after trying to substitute regular smoked sausage once when I couldn't find andouille. While still delicious, it lacked that distinctive Cajun character that makes this soup special. My husband now specifically requests I use "the real stuff" whenever I make this recipe.
Storing and Freezing
This Cajun potato soup stores beautifully in the refrigerator for up to 4 days in an airtight container. The flavors actually deepen and improve overnight making it perfect for meal prep. When reheating, add a splash of broth or milk as needed to achieve your desired consistency since the soup thickens as it sits. For freezing, let the soup cool completely then portion into freezer-safe containers leaving some room for expansion. It keeps well for up to 3 months. Thaw overnight in the refrigerator before gently reheating on the stovetop.

Make It Your Own
The beauty of this Cajun potato soup is how easily it adapts to what you have on hand. No andouille? Substitute kielbasa or even chorizo for a different but equally delicious flavor profile. Vegetarians can skip the sausage entirely and use vegetable broth for a still-satisfying meal. For a lighter version, substitute half the cream with whole milk or even evaporated milk. Dairy-free folks can use coconut cream for richness. Feel free to add additional vegetables like corn, bell peppers, or even kale stirred in during the last few minutes of cooking. The Cajun seasoning amount can be adjusted up or down depending on your spice preference.
Serving Suggestions
This hearty soup deserves proper accompaniments to make it a complete meal. A crusty baguette or cornbread makes the perfect pairing to soak up every last drop of the flavorful broth. For a lighter side, a simple green salad with vinaigrette provides welcome contrast to the rich soup. If serving for a special occasion, consider small cups as a starter before a main course of grilled fish or chicken. Garnish options beyond parsley include sliced green onions, a dollop of sour cream, or even some additional grated cheese. This soup actually makes an excellent base for a loaded baked potato-style presentation with bacon bits, chives and cheese on top.
Frequently Asked Questions
- → Can I substitute andouille sausage?
Yes, you can substitute andouille sausage with kielbasa, smoked sausage, or even a plant-based sausage alternative for a different flavor profile.
- → What type of potatoes work best?
Russet potatoes are ideal due to their starchy texture, which helps thicken the soup and create a creamy consistency.
- → How can I adjust the spice level?
To adjust the spice level, reduce the amount of Cajun seasoning and red pepper flakes for a milder soup, or add extra for more heat.
- → Can this soup be made vegetarian?
Yes, you can omit the sausage and use vegetable broth instead of chicken broth. Add smoked paprika for a hint of smoky flavor.
- → What can I serve with this soup?
This soup pairs well with crusty bread, cornbread, or a fresh green salad for a complete meal.
- → Can I prepare this soup in advance?
Yes, you can prepare the soup in advance and reheat it gently on the stovetop. Add the fresh parsley just before serving for the best flavor.