Cut chicken into bite-sized pieces and season with salt, black pepper, and paprika.
In a bowl, mix softened butter with garlic, Dijon mustard, paprika, lemon juice, lemon zest, and half of the parsley to create the Cowboy Butter blend.
In a skillet over medium-high heat with olive oil, sear the chicken until golden brown (7-10 minutes), then set aside.
Cook linguine in salted boiling water until al dente; reserve ½ cup of pasta water before draining.
In the same skillet, add chicken broth (or pasta water) and bring to a simmer. Stir in the Cowboy Butter blend until melted. Add heavy cream and Parmesan cheese until smooth.
Combine the drained linguine and seared chicken with the sauce. Toss until coated and adjust thickness with reserved pasta water if needed. Garnish with remaining parsley.