Add chicken to the crock pot. Top the chicken with the butter, minced garlic, Italian seasoning and salt.
Cover and cook on low for 5-7 hours or on high for 2.5-3.5 hours until the chicken has an internal temperature of 165 degrees F.
After this time, remove the chicken. Then stir together the cornstarch, heavy whipping cream and grated parmesan cheese in a small bowl.
Whisk this mixture into the sauce in the crock pot, stir the spinach into the sauce and place the chicken back on top.
Cover and cook on low for 30 minutes to thicken and heat the sauce through and the spinach is slightly wilted.
Serve warm as is or over pasta and enjoy!
Notes
Helpful Tips
Cut Chicken - If your chicken breasts are very large, I suggest cutting them into smaller pieces.
Cooking Time - Cooking time will vary depending on your slow cooker and the size of your chicken. We recommend using a meat thermometer to ensure your chicken is fully cook with an internal temp of 165 degrees.
Variations Ideas
Change Chicken - You can easily substitute other cuts of chicken for chicken breasts. We like chicken thighs and chicken tenders for another great meal idea. If you use chicken thighs, keep in mind they take longer to cook.
Cream Cheese - For a richer taste to the sauce add cream cheese. You can add this to taste based on preference. Whisk as normal and pour into crock pot at the end to simmer. Cream cheese will make the sauce thicker so you may need to add more whipping cream.
Mushrooms - Add in 8 oz can of sliced mushrooms on top of the chicken in the slow cooker. This adds more delicious if you like mushrooms.
Make it Spicy - If you like dishes with a little heat, add a 1/2 teaspoon crushed red pepper flakes.
Add Vegetables - We love spinach in this but you can omit and try other things. Kale is good in this dish as well.