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Creamy Chicken Fettuccine Alfredo with grilled chicken, mushrooms, and fresh parsley in a red bowl.

The Best Creamy Chicken Fettuccine Alfredo

A rich and creamy Chicken Fettuccine Alfredo made with tender chicken breast, mushrooms, and a luscious half-and-half-based Alfredo sauce. Easy, comforting, and better than takeout!
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Course: Dinner, Main Course
Cuisine: Comfort Food, Italian
Calories: 620
Ingredients Equipment Method Notes

Ingredients
  

  • 2 lbs boneless, skinless chicken breasts
  • 3/4 lb fettuccine pasta
  • 1 lb white mushrooms, thickly sliced
  • 1 small onion, finely chopped
  • 3 cloves garlic, minced
  • 3 1/2 cups half-and-half
  • 1/4 cup parsley, finely chopped, plus more for garnish
  • 1 tsp sea salt (plus more for pasta water)
  • 1/4 tsp black pepper (or to taste)
  • 3 Tbsp olive oil (divided)
  • 1 Tbsp unsalted butter
  • to serve Parmesan cheese (optional)

Equipment

  • Large pot (for pasta)
  • Large skillet or Dutch oven
  • Whisk
  • Cutting board & knife
  • Measuring cups & spoons

Method
 

  1. Cook fettuccine in a large pot of salted water until al dente. Drain and set aside.
  2. Slice chicken into strips, season with salt and pepper. Sauté in 2 Tbsp olive oil over medium-high heat until golden and cooked through, about 5–6 minutes. Remove and set aside.
  3. In the same skillet, add 1 Tbsp olive oil and butter. Sauté onion for 3 minutes, then add mushrooms and cook 5–7 minutes. Add garlic and sauté 30 seconds more.
  4. Add half-and-half to the pan and bring to a gentle simmer over medium-high heat. Simmer 8–10 minutes, stirring occasionally, until thickened.
  5. Return cooked chicken to the sauce, stir in parsley, and season with additional salt and pepper to taste.
  6. Add cooked pasta to the skillet and toss until well-coated with sauce. Simmer 1 minute until heated through.
  7. Turn off heat, cover, and let rest 10–15 minutes for flavors to meld. Garnish with fresh parsley and Parmesan, if desired.

Notes

Use heavy cream for a richer sauce or whole milk for a lighter version. Add veggies like broccoli or spinach, or swap in shrimp or sausage for protein variety. A pinch of nutmeg deepens flavor.