This Blackened Steak and Shrimp Alfredo has been one of my go-to celebratory weeknight dishes ever since I first paired a smoky, spicy blackened seasoning with an ultra-creamy parmesan sauce. I discovered this combination on a rainy evening when I wanted something indulgent that could still be made quickly. The contrast between the peppery char on the steak, the tender shrimp, and the smooth, cheesy sauce is what makes this plate memorable — every forkful hits salty, spicy, and creamy notes that pull together beautifully.

I love serving this for small dinner parties because it feels luxurious without requiring hours in the kitchen. The method is straightforward: cook pasta, sear shrimp and steak quickly to keep them tender, then finish everything in a parmesan cream sauce that clings to each penne. The recipe strikes a balance between bold flavors from the blackened seasoning and the comforting, familiar texture of a classic cream sauce. Family members and guests always comment on the steak cubes — browned on the outside and pink within — while the shrimp stays juicy, not rubbery.

Ingredients

• Penne pasta: Use 8 ounces of penne for four servings. I prefer a ridged penne because the sauce clings better; look for a good-quality durum wheat pasta from brands like Barilla or De Cecco for reliable al dente texture.
• Shrimp: One pound of large raw shrimp, peeled and deveined with tails removed. Choose sustainably sourced, U.S. Gulf or farmed white shrimp for a firm texture. Large shrimp hold up well to quick searing without becoming rubbery.
• Top sirloin steak: One pound, cut into 1-inch cubes. Top sirloin offers great beefy flavor and browns well. If you prefer, use strip steak or flat iron for slightly more marbling.
• Blackened seasoning: Use 1 teaspoon for the shrimp and 1 teaspoon for the steak plus 1 tablespoon in the sauce. A good blend includes paprika, cayenne, thyme, and black pepper. Store-bought blends like McCormick Cajun or Slap Ya Mama work, or make your own for control of heat.
• Butter and oil: Use 1 tablespoon vegetable oil for shrimp sear and 1/4 cup (half stick) unsalted butter for the steak and sauce foundation. Butter adds richness and helps build a silky sauce.
• Aromatics: One small yellow onion diced (about 1/2 cup) and 2 teaspoons minced garlic provide a savory base; cook the onion until softened but not browned to keep the sauce sweet and balanced.
• Cream and cheese: Two cups heavy whipping cream and two cups freshly grated parmesan cheese. Freshly grated parmesan melts more smoothly and gives a nutty, salty finish.
• Salt and pepper: 1/2 teaspoon kosher salt and 1/2 teaspoon black pepper to taste. Adjust at the end after combining to avoid over-salting the cheese.
• Garnish: Chopped fresh parsley adds color and a bright herbal lift to cut the richness.

Instructions

Cook the pasta: Bring a large pot of water to a rolling boil and salt it generously. Add 8 ounces penne and cook until al dente according to package directions, usually 9 to 11 minutes. Before draining, reserve 1 cup of the pasta cooking water — the starchy water helps loosen the sauce and helps it cling to the pasta. Drain the rest and set the penne aside. Prepare the shrimp: Pat 1 pound large shrimp completely dry with paper towels and season evenly with 1 teaspoon blackened seasoning. Heat 1 tablespoon vegetable oil in a large 13-inch skillet over medium-high heat until shimmering but not smoking. Add shrimp in a single layer and sear 1 to 2 minutes per side until they are opaque and pink. Remove shrimp to a plate and tent to keep warm; avoid overcooking to prevent rubberiness. Cook the steak: Pat 1 pound top sirloin cubes dry and season with 1 teaspoon blackened seasoning. Increase the skillet heat to high and add 1/4 cup unsalted butter. Once melted and foaming, add steak cubes spaced apart; sear 1 to 2 minutes per side until a brown crust forms and the interior remains slightly pink. Transfer to the plate with the shrimp and tent. Searing at high heat builds flavor through the Maillard reaction while keeping the interior tender. Make the sauce: Reduce heat to medium and add the diced onion to the same skillet; cook for 3 to 5 minutes until softened and translucent. Add 2 teaspoons minced garlic and cook another minute until aromatic. Pour in 2 cups heavy cream and stir, scraping browned bits from the pan. Add 1/4 to 1/2 cup reserved pasta water, 2 cups grated parmesan, 1 tablespoon blackened seasoning, 1/2 teaspoon kosher salt, and 1/2 teaspoon black pepper. Stir continuously until the cheese melts and the sauce thickens slightly to a silky consistency. If the sauce feels too thick, add more reserved pasta water a tablespoon at a time. Toss pasta with sauce and serve: Add the cooked penne to the skillet and toss gently to coat, using tongs or a spatula to fold the ingredients together. Return steak and shrimp to the pan to warm briefly, about 1 minute, then remove from heat. Garnish with chopped parsley and serve immediately to preserve the contrast between tender proteins and warm sauce.

Storage Tips

To keep quality high, store leftover pasta in shallow airtight containers and refrigerate within two hours of serving. This plate will keep for up to 3 days. If you plan to freeze, separate components: freeze the sauce in a freezer-safe container and the cooked proteins in a separate bag—this reduces texture changes. Thaw overnight in the refrigerator and reheat gently on the stovetop with a splash of cream or water to loosen the sauce. Avoid reheating in a microwave at high power; short bursts at medium power with stirring will preserve texture.

Ingredient Substitutions

If you need dietary swaps, use gluten-free penne and ensure your parmesan is certified gluten-free to remove gluten. For a lower-fat version substitute half-and-half for heavy cream, though the sauce will be lighter and may need cornstarch slurry (1 teaspoon cornstarch mixed with 2 teaspoons cold water) to achieve the same body. For dairy-free, use a vegan parmesan and a heavy plant cream such as full-fat coconut cream; flavor will shift but richness remains. Swap top sirloin for skirt or flank steak if you prefer a leaner, more intensely beefy bite. For milder heat, reduce the blackened seasoning in the sauce to 2 teaspoons.

Serving Suggestions

Serve this dish hot with a crisp green salad dressed in a lemon vinaigrette to cut the richness. Garlic toast or thinly sliced baguette are excellent for sopping up any leftover sauce. For a festive touch, add a squeeze of fresh lemon over the plated dish to brighten flavors, or finish with extra grated parmesan and a sprinkle of red pepper flakes for more heat. Pair with a medium-bodied white wine like Chardonnay or a fruit-forward red like Zinfandel to stand up to the cream and spices.

Cultural Background

This plate blends classical Italian cream sauce traditions with American Southern-inspired blackened seasoning. Blackening as a technique comes from Cajun cuisine and was popularized in restaurants in the late 20th century; it involves cooking proteins over high heat in a spiced butter that chars the exterior. Alfredo-style cream sauces are Italian-American adaptations that emphasize butter, cream, and parmesan. Combining the two creates a bold fusion that celebrates robust seasoning alongside silky Italian comfort.

Seasonal Adaptations

In summer, swap parsley for fresh basil and add cherry tomatoes halved for a bright, seasonal touch. In winter, stir in a handful of sautéed mushrooms or wilted spinach for extra warmth and earthiness. For holiday dinners, consider using ribeye cubes instead of sirloin for added decadence, or swap penne for pappardelle to elevate the presentation.

Meal Prep Tips

For meal prep, cook the pasta just shy of al dente and cool it quickly to stop cooking. Store pasta, sauce, and proteins in separate containers for up to 3 days. When ready to eat, reheat the sauce first, then add pasta and a splash of water to loosen the texture, and finally reheat proteins briefly to avoid overcooking. Use microwave-safe shallow containers to reheat quickly, stirring halfway through to ensure even temperature.

With its combination of spice, cream, and perfectly seared proteins, this dish becomes an instant favorite in any home cook's repertoire. Make it your own by adjusting the spice level or proteins, and enjoy the comfort of a rich, satisfying plate that comes together in under an hour.