Cajun Alfredo Sauce
This Cajun Alfredo Sauce is a rich, creamy twist on classic Alfredo, made with garlic, butter, Parmesan, and bold Cajun spices. Perfect over pasta with chicken, shrimp, sausage, or veggies for an easy, flavor-packed dinner.
Ingredients
- 4 tablespoons unsalted butter
- 1 tablespoon olive oil
- 4 cloves garlic minced (about 1 tablespoon)
- 1 to 1 1/2 tablespoons Cajun seasoning to taste
- 1 teaspoon smoked paprika reduce to 1/2 teaspoon if your Cajun seasoning is very smoky
- 1/2 teaspoon onion powder
- 1/4 teaspoon crushed red pepper flakes optional, for extra heat
- 2 cups heavy cream
- 1/2 cup whole milk
- 1 cup Parmesan cheese freshly grated, lightly packed
- 1/4 teaspoon kosher salt plus more to taste
- 1/4 teaspoon black pepper freshly ground
- 1 tablespoon lemon juice fresh, about 1/2 lemon
- 2 tablespoons fresh parsley chopped, optional for garnish
- 1 cup smoked sausage sliced and browned, optional add-in
- 1 cup cooked shrimp optional add-in
- 1 cup cooked Cajun chicken breast sliced, optional add-in
- 1 cup sautéed bell peppers and onions optional add-in
- 12 ounces pasta such as fettuccine, linguine, penne, or rigatoni, cooked al dente, for serving
Instructions
- Add the butter and olive oil to a large skillet or sauté pan over medium heat. Let the butter melt completely and start to foam slightly, without browning.4 tablespoons unsalted butter, 1 tablespoon olive oil
- Stir in the minced garlic and cook for 30–60 seconds, just until fragrant but not browned. Sprinkle in the Cajun seasoning, smoked paprika, onion powder, and red pepper flakes (if using). Stir constantly for another 30 seconds to bloom the spices.4 cloves garlic, 1 to 1 1/2 tablespoons Cajun seasoning, 1 teaspoon smoked paprika, 1/2 teaspoon onion powder, 1/4 teaspoon crushed red pepper flakes
- Slowly pour in the heavy cream and milk while whisking. Keep the heat at medium and stir well so the spices distribute evenly throughout the liquid.2 cups heavy cream, 1/2 cup whole milk
- Bring the mixture to a gentle simmer with small bubbles around the edges, not a rolling boil. Let it simmer for 5–7 minutes, stirring occasionally, until slightly thickened and it coats the back of a spoon. Reduce the heat if it starts to boil hard.
- Reduce the heat to low. Add the freshly grated Parmesan in small handfuls, whisking constantly after each addition until melted and smooth. Continue stirring until the sauce is silky and thickened, about 2–3 minutes.1 cup Parmesan cheese
- Taste the sauce, then add the kosher salt and black pepper as needed, keeping in mind that Parmesan and Cajun seasoning are salty. Stir in the lemon juice to brighten the flavors.1/4 teaspoon kosher salt, 1/4 teaspoon black pepper, 1 tablespoon lemon juice
- If the sauce is too thick, add a splash of milk or pasta cooking water and stir until it reaches your preferred consistency. For a thicker sauce, let it simmer on low for another 1–2 minutes, stirring often.
- If using smoked sausage, shrimp, Cajun chicken, or sautéed bell peppers and onions, stir them into the warm sauce and cook for 2–3 minutes, just until heated through and coated.1 cup smoked sausage, 1 cup cooked shrimp, 1 cup cooked Cajun chicken breast, 1 cup sautéed bell peppers and onions
- Add hot, drained pasta to the skillet and toss to coat in the Cajun Alfredo sauce. Serve immediately, topped with chopped fresh parsley and extra Parmesan if desired.2 tablespoons fresh parsley, 12 ounces pasta
Notes
Use freshly grated Parmesan for the smoothest, creamiest texture—pre-grated cheese can make the sauce grainy. Different Cajun seasoning brands vary in salt and heat, so start with the lower amount and taste before adding extra salt or spice. Keep the sauce at a gentle simmer rather than a hard boil to prevent the cream from separating. A splash of lemon juice at the end helps cut the richness and brighten the flavors. Sauce can be cooled and refrigerated for 3–4 days; reheat gently with a splash of milk or cream.
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