Creamy Mushroom Chicken Spaghettini (Printable)

Tender chicken and spaghettini in a velvety mushroom cream sauce. Comforting, satisfying, and lighter than it tastes.

# What You Need:

→ Pasta

01 - 10.5 oz whole wheat spaghettini or regular spaghettini

→ Chicken

02 - 2 medium boneless, skinless chicken breasts (about 12 oz total)
03 - 1/2 teaspoon salt
04 - 1/4 teaspoon black pepper
05 - 1 tablespoon olive oil

→ Mushrooms & Vegetables

06 - 9 oz cremini or white mushrooms, sliced
07 - 2 cloves garlic, minced
08 - 1 small yellow onion, finely diced
09 - 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
10 - 1 cup baby spinach, roughly chopped (optional)

→ Sauce

11 - 2 tablespoons all-purpose flour
12 - 1 cup low-sodium chicken broth
13 - 3/4 cup low-fat milk (1% or 2%)
14 - 1/4 cup grated Parmesan cheese
15 - 1/2 teaspoon Dijon mustard
16 - Salt and pepper to taste

→ Garnish

17 - 2 tablespoons fresh parsley, chopped
18 - Extra grated Parmesan cheese (optional)

# How To Make It:

01 - Bring a large pot of salted water to a boil. Cook the spaghettini according to package instructions until al dente. Reserve 1/2 cup of pasta water, then drain and set aside.
02 - Pound the chicken breasts to an even thickness. Season both sides with salt and pepper.
03 - Heat olive oil in a large nonstick skillet over medium-high heat. Add chicken breasts and cook for 5–6 minutes per side, until golden and cooked through. Remove to a plate, cover loosely, and let rest.
04 - In the same skillet, reduce heat to medium. Add mushrooms and onion; sauté for 4–5 minutes until softened and golden. Add garlic and thyme, cook for 1 minute.
05 - Sprinkle flour over the vegetables and stir well. Cook for 1 minute.
06 - Gradually whisk in the chicken broth, followed by the milk, stirring to avoid lumps. Bring to a gentle simmer and cook 2–3 minutes until slightly thickened.
07 - Add Parmesan cheese and Dijon mustard; stir until smooth. Season with salt and pepper. Add spinach now if using and stir until wilted.
08 - Slice chicken into strips. Add cooked spaghettini and chicken to the sauce; toss gently to coat. Add a splash of reserved pasta water if needed for desired sauce consistency.
09 - Serve immediately, garnished with fresh parsley and extra Parmesan if desired.

# Expert Suggestions:

01 -
  • The sauce stays velvety and rich while using low-fat milk instead of heavy cream
  • Everything comes together in one pan besides the pasta, so cleanup is surprisingly minimal
  • It reheats beautifully for lunch the next day, if there's any left
02 -
  • That reserved pasta water is liquid gold—it helps bind the sauce to the pasta if things get too thick
  • Don't rush the flour step or your sauce will taste raw instead of velvety smooth
03 -
  • Low-sodium broth is crucial here because the sauce reduces and concentrates salt
  • Whole wheat pasta needs an extra minute of cooking time and more frequent stirring
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