Bring a large pot of salted water to a boil and cook the bowtie pasta according to package directions. Stir occasionally to prevent sticking. Drain the pasta and set it aside while you prepare the remaining ingredients.
Pat the chicken pieces dry with paper towels before seasoning. Toss them with Cajun seasoning, salt, and black pepper until evenly coated. This helps build flavor from the very beginning.
Heat olive oil and two tablespoons of butter in a large skillet over medium-high heat. Add the seasoned chicken and cook until golden brown and fully cooked through. Remove the chicken from the skillet and set aside.
Reduce the heat slightly and add the minced garlic to the same skillet. Stir constantly for about a minute until fragrant. Be careful not to burn the garlic, as it can become bitter.
Pour the heavy cream into the skillet and stir well to combine with the garlic and pan drippings. Allow the mixture to simmer gently for a few minutes so the flavors can develop.
Gradually stir in the freshly grated Parmesan cheese. Continue stirring until the cheese melts completely and the sauce becomes smooth and creamy. Taste and adjust seasoning if necessary.
Return the cooked chicken to the skillet and add the drained bowtie pasta. Toss everything together until the pasta is evenly coated with the creamy Cajun garlic butter sauce.
Add the remaining butter and stir until melted. This final addition creates an extra silky texture and enhances the rich flavor of the sauce.
Sprinkle freshly chopped parsley over the pasta before serving. The fresh herbs add brightness and a beautiful finishing touch to the dish.