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Slow Cooker Garlic Parmesan Chicken

Slow Cooker Garlic Parmesan Chicken- a creamy Parmesan sauce flavored with garlic, onion, mushrooms, and spinach makes this recipe a great family meal.

Garlic Parmesan Chicken over rice with green beans.

The chicken cooks in just 3 1/2 to 4 hours. Tastes great served over white rice. You could also serve it over mashed potatoes or noodles. Green peas, steamed broccoli or green beans make a great side. This is comfort food the whole family will enjoy.

How To Make Slow Cooker Garlic Parmesan Chicken

  1. Layer the onion, garlic, chicken, and mushrooms in the slow cooker.
  2. Sprinkle on the seasonings.
  3. Pour in the chicken broth and melted butter.
  4. Cover and cook on LOW for 3 to 3 1/2 hours.
  5. Whisk together the evaporated milk and flour and add to the slow cooker. Cook on HIGH for 30 minutes. This step is to thicken the sauce. Check the chicken before adding in the flour mixture. If it is already cooked through, remove the chicken from the slow cooker. The chicken is done when it reaches a temperature of 165 F.
  6. Remove the chicken if you haven’t already and whisk in the parmesan. Stir in the spinach leaves.
  7. Spoon sauce over chicken to serve.
Garlic Parmesan Chicken in a slow cooker.

Recipe Tips

  • I use a 6-quart slow cooker for this recipe.
  • For extra seasoning add a teaspoon of dried Italian seasoning or dried basil.
  • The mushrooms can be left out if you don’t like them.
  • Chicken thighs can be used instead of chicken breasts but keep in mind they take a little longer to cook.
  • If you want this dish spicy, double the amount of crushed red pepper flakes.
  • I like to cook chicken breasts on LOW in the slow cooker. Too often they turn out dry and overcooked if they are cooked on the HIGH setting. The chicken should only need about 4 hours of cooking time total.
  • If your chicken breasts are very large, you might want to cut them in half before putting them in the slow cooker.
Slow Cooker Garlic Parmesan Chicken on plate with green beans.

Try These Other Slow Cooker Chicken Recipes

Watch the short video below to see how easy this recipe is to make.

Parmesan Chicken over rice on a plate.

Slow Cooker Garlic Parmesan Chicken

Slow Cooker Garlic Parmesan Chicken- a creamy Parmesan sauce flavored with garlic, onion, mushrooms, and spinach makes this recipe a great family meal.
PREP: 12 minutes
COOK: 4 hours


  • 1/2 medium sweet or yellow onion, diced
  • 3 to 4 garlic cloves, minced
  • 4 boneless, skinless chicken breasts
  • 8 ounces sliced white or cremini mushrooms
  • 1/2 teaspoon garlic powder
  • 1/2 teaspoon black pepper
  • 1/2 teaspoon salt
  • 1/4 teaspoon crushed red pepper flakes
  • 1/2 cup chicken broth
  • 3 tablespoons melted butter
  • 1 cup evaporated milk or half-and-half
  • 3 tablespoons all-purpose flour
  • 1/2 cup freshly grated Parmesan cheese
  • 2 cups packed baby spinach leaves


  • Place onion and garlic in the bottom of a lightly greased 6-quart slow cooker.
  • Place chicken breasts and mushrooms on top.
  • Sprinkle the garlic powder, salt, pepper, and red pepper flakes on top.
  • Drizzle the chicken broth and melted butter over everything.
  • Cover and cook on LOW for 3 to 3 1/2 hours.
  • Open the slow cooker. In a small bowl, whisk together evaporated milk and flour until smooth. Pour it into the slow cooker and mix it in.
  • Cover slow cooker and cook on HIGH for 30 minutes to thicken the sauce.
  • Remove the chicken and place on a serving platter.
  • Add the parmesan cheese to the slow cooker and whisk into the sauce. Add the spinach and stir to mix it in.
  • To serve, spoon sauce over chicken.


Calories: 393kcal
Course: Dinner, Main Dish
Cuisine: American
Keyword: crock pot chicken, slow cooker

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Recipe adapted from 365daysofcrockpot.com

Disclosure: This post contains affiliate links.

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5 thoughts on “Slow Cooker Garlic Parmesan Chicken”

  1. Beyond delicious! Served over Pappardelle noodles and a mixture of mushrooms(oyster,cremini, button,shiiitake). I’ve shared with everyone cook I know! Delicious!!

  2. made this for dinner tonight..knly thing i changed was browning the chicken a little after it was cooked..i would usually do this before but was trying to follow the recipe.. it came out amazing and made a side of mashed califlower since im doing low carbs.

  3. Mike McAllister

    Made this last night for dinner. Excellent over rice and our kids loved eating the spinach and mushrooms. I cut the thigh meat to help with cooking time and this was wonderful. Will certainly share and make again. This is a perfect dish to add whatever vegetables you have left over.

    1. Janine Marsh

      This recipe was so super easy and so delicious! Made it on A Sunday so didn’t have to do much while watching football. Love easy Sunday dinners!

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