Start by preparing your ingredients ahead of time. Slice the chicken breasts into strips, mince the garlic, and grate the Parmesan cheese fresh for the best results. Fill a large pot with water and bring it to a boil for your pasta. While the pasta cooks, you’ll build the sauce in a skillet for a seamless cooking process. Timing is key to getting everything hot and ready to serve.
Begin by cooking the linguine in a large pot of salted water until it’s al dente, following the package instructions. Once done, drain and set it aside, but don’t rinse it—this helps the sauce stick better. While the pasta is cooking, heat olive oil in a large skillet over medium heat. Season the chicken with salt and pepper, then cook for 6-8 minutes until golden brown and cooked through. Remove the chicken from the skillet and set aside.
In the same skillet, melt the butter and sauté the minced garlic for about 1 minute until fragrant. Add in the chicken broth, heavy cream, Dijon mustard, and red pepper flakes (if using). Let the mixture simmer for 2-3 minutes, stirring often until slightly thickened. This forms a flavorful cowboy butter base that ties everything together.
Return the cooked chicken to the skillet along with the drained linguine. Toss gently to combine everything and coat the pasta in the sauce. Sprinkle the freshly grated Parmesan cheese over the top and stir until melted and smooth. Garnish with chopped fresh parsley for a touch of color and freshness. Serve warm and enjoy the bold, buttery flavors in every bite.