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Dinner · Part 2 of 3: Instructions

Crockpot Roasted Red Pepper Alfredo Chicken Thighs Step-by-step instructions

A close-up of creamy roasted red pepper alfredo chicken thighs served over fettuccine on a white plate.
Prep
Cook
Total
Serves
4
Includes 5 min resting

Before you start

Before beginning, ensure your slow cooker is clean and positioned on a level, heat-resistant surface away from any splashes or obstructions. Have all your ingredients measured and ready to go.

If using store-bought alfredo sauce, check that it is at room temperature for better integration. Prepare your serving plates and ensure you have a pair of tongs or a large serving spoon ready for plating the chicken once it is finished cooking.

Ingredients at a glance (5)
  • 4 lbs chicken thighs, boneless and skinless
  • 1 cup roasted red peppers, sliced
  • 1 tbsp Italian seasoning
  • 2 cups alfredo sauce, store-bought or made ahead
  • 1 cup shredded mozzarella cheese

Instructions

Preparation and assembly

  1. Assemble the slow cooker
    Place the raw chicken thighs into the base of the slow cooker insert. Ensure they are arranged in an even layer to promote uniform cooking throughout the process.
    Look for chicken is evenly distributed
    Tip Pat the chicken dry with paper towels before adding to the cooker to improve texture.
  2. Add aromatics and seasoning
    Scatter the sliced roasted red peppers over the chicken thighs. Sprinkle the Italian seasoning evenly across the meat to ensure every piece gets a good distribution of herbs.
    Look for peppers are spread over the chicken
    Tip Use a mix of dried herbs if Italian seasoning is not available.

The chicken is arranged in a single layer in the slow cooker with the peppers and seasonings distributed evenly over the top. The setup should look organized, and the ingredients should be ready for the addition of the sauce.

Ensure the slow cooker is plugged in and ready to be set to the low setting before proceeding to the next stage of the cooking process.

Slow cooking process

  1. Add sauce and cook
    Pour the alfredo sauce over the chicken and peppers. Cover the slow cooker with its lid and cook on low for 4 hours until the chicken is fully cooked through.
    Look for sauce is bubbling and chicken is opaque
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Do not lift the lid during the cooking process to maintain a consistent temperature.

The sauce has been poured over the chicken, and the lid is secured. The slow cooker is operating on the low setting. During this time, the kitchen will begin to smell savory and creamy as the peppers and Italian herbs infuse the sauce. Avoid lifting the lid during this phase to maintain the necessary internal heat for consistent and safe cooking.

Finishing and melting

  1. Finish and serve
    Once the chicken reaches 165°F (74°C), sprinkle the shredded mozzarella over the top of the dish. Cover for 5 minutes until the cheese is melted, then serve immediately over cooked fettuccine.
    Look for cheese is melted and bubbly
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Let the dish rest for 5 minutes before serving to allow the sauce to thicken slightly.

The chicken has reached the safe temperature, and the mozzarella cheese has been added to the top. The cheese should be completely melted and bubbly, creating a beautiful, glossy finish. The dish is now ready to be served hot over a bed of freshly boiled fettuccine. Check that the sauce consistency is to your liking before plating the meal for your guests.

Common mistakes

A common mistake is overcrowding the slow cooker, which can prevent the chicken from cooking evenly. Another error is removing the lid too frequently, which releases trapped steam and significantly increases the cooking time.

Ensure you are using the correct setting, as cooking on high instead of low can cause the sauce to separate or the chicken to become stringy. Finally, adding the cheese too early can cause it to burn or become rubbery; always wait until the final stage.

How to tell it’s done

The chicken is considered done when it reaches an internal temperature of 165°F (74°C) as measured by a meat thermometer inserted into the thickest part of the thigh. The meat should be tender and easily pierced with a fork.

The sauce will be glossy and slightly thickened, with the roasted red peppers softening into the creamy mixture. Always verify the temperature to ensure safety before serving the meal to your guests.

  • Poultry: 165°F (74°C) in the thickest part

Coming up in Part 3: common questions

  • Can this recipe be made with chicken breasts instead of thighs?
  • How can the sauce be prevented from breaking?
  • Is it possible to cook the pasta directly in the slow cooker?

Also in Part 3: variations (Spicy Alfredo Chicken, Spinach and Alfredo Chicken), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)