Prepare the Chicken: Place chicken breasts in the crockpot. Season with salt, pepper, garlic powder, onion powder, and Italian seasoning. Add minced garlic on top.

Add the Sauce Ingredients: Pour in heavy cream and chicken broth. Add Parmesan cheese and cubed cream cheese. Cover and cook on LOW for 4-5 hours or HIGH for 2-3 hours, until chicken is tender.

Shred the Chicken: Remove the chicken from the crockpot and shred it using two forks. Return shredded chicken to the crockpot and stir to combine with the sauce.

Add the Pasta: Cook penne pasta according to package instructions, then drain. Add the cooked pasta to the crockpot and stir to coat with the creamy garlic Parmesan sauce.

Melt the Cheese: Sprinkle shredded mozzarella cheese on top, cover, and let sit for 5-10 minutes until melted.

Serve: Garnish with red pepper flakes (if using) and fresh parsley. Serve warm.