Start by preparing your ingredients: chop the chicken into large chunks and mince the garlic. Set everything nearby for easy assembly.
Add the chicken chunks to the slow cooker. Pour in the chicken broth and heavy cream, then sprinkle in the minced garlic. Give everything a gentle stir to combine.
Break the uncooked fettuccine in half and layer it on top of the chicken mixture, making sure it’s submerged in the liquid. This helps it cook evenly and absorb flavor.
Sprinkle the freshly grated Parmesan cheese over everything, then cover the slow cooker with its lid. Set it to low and cook for 4 hours, until the chicken is tender and the pasta is al dente.
About an hour before serving, lift the lid and gently stir the mixture to combine the creamy sauce with the pasta. If it looks too thick, add a splash of broth or cream to loosen it up.
Taste the dish and adjust the seasoning if needed. Stir in chopped parsley for a fresh, bright flavor. The sauce should be smooth and cling to the pasta and chicken evenly.
Turn off the slow cooker and let the dish sit uncovered for 5 minutes to allow the sauce to thicken slightly. Then, serve hot, garnished with extra Parmesan and parsley if desired. Enjoy your effortless, cheesy comfort!