Blackened Steak And Shrimp Alfredo Recipe

Name: Blackened Steak And Shrimp Alfredo Recipe
Ingredients: 1 tablespoon ancho chile powder; 2 teaspoons paprika; 2 teaspoons garlic powder; ½ teaspoon salt, divided; ½ teaspoon black pepper, divided; 1 teaspoon dried thyme; 1 teaspoon brown sugar; 1 pound New York strip steak; ½ pound large shrimp, peeled and deveined; 6 tablespoons unsalted butter, divided; 2 cloves garlic, minced; 4 ounces cream cheese; 1 cup heavy whipping cream; 1 cup milk; ½ cup freshly grated Parmesan; ½ pound fettuccine, cooked; ¼ cup chopped parsley, for serving