Cajun Steak Alfredo

Cajun steak Alfredo is what happens when a steakhouse dinner and a bowl of fettuccine meet in one skillet. A thick sirloin gets a peppery Cajun crust in a hot pan, rests while the pasta cooks, and then goes on top of noodles coated in a garlicky Parmesan cream sauce with a little Cajun warmth of its own.

The sauce starts in the skillet the steak just left, so it picks up every browned bit, and the steak’s resting juices get stirred in at the end. Dinner for 4 is on the table in about 45 minutes.

Why You’ll Love This Recipe

• Steakhouse flavor at home: One well-seared sirloin, sliced thin, goes a long way over a skillet of pasta.
• Cajun heat you control: Most of the spice is on the steak crust; the sauce gets just a teaspoon, so the cream stays mellow.
• A real Alfredo sauce: Butter, garlic, cream, and Parmesan, with no flour or jarred sauce.
• Nothing wasted: The pan drippings and the steak’s resting juices both end up in the sauce.
• Easy to swap: Use ribeye or strip steak, add shrimp, or trade the steak for chicken.

Ingredients

Prep: 15 minutes  |  Cook: 30 minutes  |  Total: 45 minutes  |  Yield: 4 servings

Equipment: 12-inch cast-iron or heavy stainless skillet, large pasta pot, tongs, instant-read thermometer

• 1 1/4 pounds boneless top sirloin steak, about 1 inch thick
• 4 teaspoons Cajun seasoning, divided
• Kosher salt, for the pasta water and to taste
• 1 tablespoon avocado oil or vegetable oil
• 12 ounces dried fettuccine
• 3 tablespoons unsalted butter
• 3 garlic cloves, minced
• 1 1/2 cups heavy cream
• 1/2 teaspoon smoked paprika
• 1/4 teaspoon ground black pepper
• 1 1/4 cups finely grated Parmesan cheese (about 4 ounces), divided
• 2 tablespoons chopped fresh flat-leaf parsley

Ingredient Notes

• Top sirloin: It’s lean, beefy, affordable, and tender when cooked to medium-rare or medium and sliced against the grain. A 1-inch-thick steak builds a good crust before the center overcooks. Ribeye and New York strip are richer swaps.
• Cajun seasoning: One tablespoon coats the steak and 1 teaspoon seasons the sauce. Blends vary a lot in heat and salt, so taste yours first. If it’s salt-free, add 1/2 teaspoon of kosher salt to the steak.
• Kosher salt: You’ll need about 1 tablespoon for the pasta water. Hold off on salting the sauce until the end; the seasoning blend and Parmesan add plenty.
• Avocado or vegetable oil: A high smoke point oil lets the pan get hot enough for a crust. Olive oil and butter tend to smoke and burn at searing heat.
• Fettuccine: The wide, flat noodles are the classic Alfredo shape. Linguine or penne work too.
• Butter and garlic: The base of the sauce. Keep the heat moderate so the garlic turns fragrant, not brown.
• Heavy cream: Its high fat content lets it simmer and thicken without breaking. Half-and-half and milk won’t thicken the same way.
• Smoked paprika and black pepper: They deepen the color of the sauce and add a gentle smoky note that suits the seared beef.
• Parmesan: Grate it finely from a wedge right before cooking. Bagged pre-shredded cheese has anti-caking agents that keep it from melting smoothly.
• Parsley: A handful of fresh herbs brightens the rich sauce.

How to Make Cajun Steak Alfredo

1. Season the steak: Pat the steak dry with paper towels and trim off any thick fat on the edge. Rub 1 tablespoon of the Cajun seasoning evenly over both sides (add 1/2 teaspoon of kosher salt too if your blend is salt-free). Let it sit on the counter while you get the water going.
2. Heat the pasta water: Set a big pot holding 4 quarts of water over high heat with the lid on. Once it reaches a rolling boil, stir in 1 tablespoon of kosher salt.
3. Sear the steak: Set a 12-inch cast-iron skillet over medium-high heat and add the oil. When it shimmers, lay the steak in and leave it alone for 4 to 5 minutes, until a dark crust forms. Flip and cook 3 to 5 minutes more, until an instant-read thermometer in the center reads 130°F for medium-rare or 140°F for medium (the USDA recommends 145°F plus a 3-minute rest). If the spices start to smoke hard, turn the heat down a notch. Move the steak to a cutting board to rest for 10 minutes; the temperature will climb about 5 degrees.
4. Boil the fettuccine: As soon as the steak comes out of the pan, drop the fettuccine into the boiling water. Cook until al dente, about 1 minute short of the package time. Ladle out 1 cup of the starchy cooking water, then drain.
5. Start the sauce: While the pasta boils, let the skillet cool for a minute, then set it over medium-low heat. If any spices in the pan look black and burnt rather than brown, wipe them out with a paper towel. Melt the butter, add the garlic, and stir for 30 to 60 seconds, scraping up the browned bits, until fragrant.
6. Simmer the cream: Whisk in the heavy cream, the remaining 1 teaspoon of Cajun seasoning, the smoked paprika, and the black pepper. Turn the heat up to medium and simmer gently, with small bubbles at the edges, for 3 to 4 minutes, until the sauce thickens enough to coat the back of a spoon.
7. Melt in the Parmesan: Lower the heat to low. Sprinkle in 1 cup of the Parmesan a little at a time, whisking until each addition melts into a smooth sauce before adding more. Keep it below a simmer from here on.
8. Toss the pasta: Add the drained fettuccine to the skillet and toss with tongs for 1 to 2 minutes. If it looks stiff, splash in some of the saved cooking water, a little at a time, until the sauce turns glossy and coats every noodle.
9. Slice the steak and serve: Cut the steak against the grain into 1/4-inch slices. Pour any juices from the cutting board over the pasta and toss once more, then taste a noodle and add a pinch of kosher salt if it needs it. Divide the fettuccine among 4 plates, fan the steak slices on top, and finish with the remaining 1/4 cup of Parmesan and the parsley.

Expert Tips

• Dry steak, hot pan. Moisture on the surface steams instead of browning. Patting it dry and waiting for the oil to shimmer gives the Cajun rub a real crust.
• Don’t skip the rest. Ten minutes lets the juices settle back into the meat instead of running onto the board, and the timing lines up perfectly with the pasta.
• Slice against the grain. Look for the lines of muscle fibers running across the steak and cut across them. Short fibers make every slice tender.
• Low heat for the cheese. Parmesan clumps and turns grainy if the sauce is boiling. Add it gradually over low heat.
• Save more pasta water than you think you need. Alfredo thickens fast as it cools. A splash of starchy water brings it right back.
• Use a thermometer. Steak thickness varies, so the temperature is a better guide than the clock.

Variations and Substitutions

• Ribeye or strip steak: Use two 10- to 12-ounce steaks about 1 inch thick. Ribeye is fattier, so pour off all but a thin film of fat before starting the sauce.
• Surf and turf: Toss 8 ounces of peeled, deveined shrimp with 1 teaspoon of extra Cajun seasoning and sear them in the skillet for 1 to 2 minutes per side after the steak comes out. For a shrimp-only version, see our Cajun shrimp pasta.
• Chicken instead of steak: Seared Cajun chicken breast works in the same sauce. Our creamy Cajun chicken pasta walks through it step by step.
• Add vegetables: Sauté 8 ounces of sliced cremini mushrooms or 1 sliced red bell pepper in the skillet for 4 to 5 minutes before adding the butter and garlic, or toss 2 cups of baby spinach into the finished sauce until wilted.
• Turn up the heat: Add 1/4 teaspoon of cayenne pepper or 1/2 teaspoon of red pepper flakes with the cream.
• Different pasta: Penne, rigatoni, or linguine all hold the sauce well. Cook 12 ounces the same way.

What to Serve with Cajun Steak Alfredo

This is a rich plate, so pair it with something fresh and crisp: a Caesar or simple green salad, steamed broccoli, or roasted green beans with lemon. For bread to catch the extra sauce, bake a tray of cheesy garlic breadsticks.

If you like this, try the classic, spice-free chicken Alfredo, or browse more easy dinner recipes.

Storage, Reheating, and Freezing

• Refrigerate: Store the pasta and the sliced steak in separate airtight containers in the fridge within 2 hours of cooking. Eat within 3 to 4 days.
• Reheat: Alfredo sauce tightens in the fridge. Put the pasta back in a pan on the lowest setting, add a spoonful or two of milk, cream, or water, stirring until creamy and hot (165°F). Add the steak slices for the last minute just to warm them, so they don’t overcook. The microwave works at 50% power in short bursts, stirring in between.
• Freeze: Skip the freezer for the finished dish: a butter-and-cream sauce breaks into an oily, gritty mess once thawed, and the noodles lose their bite. If you have extra steak, freeze the sliced meat alone in a freezer bag for up to 2 to 3 months and thaw it overnight in the fridge.

Cajun Steak Alfredo FAQ

What's the best steak for steak Alfredo?

Top sirloin is the best value: lean, tender, and full of beef flavor. Ribeye and New York strip are richer and a little more forgiving. Avoid lean, chewy cuts like round steak, which need long cooking.

How do I keep the Alfredo sauce from getting grainy?

Grate the Parmesan yourself, turn the heat to low before it goes in, and add it gradually. Once the cheese has melted, keep the sauce hot but never bubbling.

Can I use jarred Alfredo sauce?

Yes, for a shortcut. Warm a 15-ounce jar in the skillet after the steak comes out, season it with 1 teaspoon of Cajun seasoning, and thin it with pasta water as needed. The flavor will be milder than homemade.

Is Cajun steak Alfredo spicy?

It depends on your blend. With a standard store-bought Cajun seasoning, it has a moderate kick on the steak and gentle warmth in the sauce. Use less seasoning in the sauce for a milder dish.

How do I know when the steak is done?

Use an instant-read thermometer in the thickest part: 130°F for medium-rare or 140°F for medium before resting. The USDA recommends cooking whole cuts of beef to 145°F with a 3-minute rest.

Can I make it ahead?

Alfredo is best right after tossing. You can season the steak up to 1 day ahead and keep it covered in the fridge; let it sit out while the water heats, then cook as written.

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