Prepare your ingredients: Start by dicing the chicken into bite-sized pieces and mincing the garlic.
Cook the pasta: Bring a large pot of salted water to a boil. Add the linguine and cook until al dente, about 8-10 minutes. Before draining, be sure to reserve some pasta water.
Sauté the chicken: In a skillet, melt half of the butter over medium heat. Add the chicken pieces, seasoning them with salt and pepper. Cook until golden brown, about 6-8 minutes, then remove from the skillet.
Add garlic: In the same skillet, add the minced garlic and red pepper flakes. Sauté for about 1 minute until fragrant.
Create the sauce: Lower the heat and add the remaining butter and heavy cream. Stir until the mixture is creamy and well combined.
Combine: Toss the cooked linguine into the skillet with the sauce, adding reserved pasta water as needed to achieve your desired consistency. Finish with the chopped parsley.
Notes
Pairs beautifully with a crisp green salad or garlic bread. For storage, leftovers can be kept in an airtight container in the fridge for up to three days.