Cook the Pasta: Bring a large pot of salted water to a boil. Cook linguine according to package directions until al dente. Drain and set aside.
Prepare the Chicken: In a bowl, toss the chicken pieces with olive oil, paprika, garlic salt, kosher salt, and black pepper.
Sear the Chicken: Heat a large skillet over medium-high heat. Add the seasoned chicken and cook for 5-7 minutes, stirring occasionally, until golden brown and fully cooked. Remove from the pan and set aside.
Make the Sauce: In the same skillet, melt 2 tablespoons of cowboy butter over medium heat. Stir in heavy cream, garlic salt, and red pepper flakes. Simmer for 2-3 minutes until slightly thickened.
Combine Everything: Add the cooked linguine and chicken back into the skillet. Toss to coat in the creamy sauce. Stir in the remaining 2 tablespoons of cowboy butter and lemon juice for an extra burst of flavor.
Garnish and Serve: Plate the pasta and garnish with lemon slices and chopped parsley. Serve immediately and enjoy!