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Dinner · Part 2 of 3: Instructions

Easy Crockpot Chicken and Squash Casserole Step-by-step instructions

A warm, creamy chicken and yellow squash casserole served in a white bowl
Prep
Cook
Total
Serves
4
Includes 5 min resting

Before you start

Before you begin, ensure you have all ingredients measured and ready. Clean your workspace and sanitize any surfaces that come into contact with raw chicken. If you are using a standard oval slow cooker, ensure the insert is clean and dry.

Have your knife and cutting board sanitized and ready for chopping the onion and slicing the squash. Once the chicken is cut, wash your hands thoroughly and wipe down the area to maintain a safe kitchen environment.

Ingredients at a glance (7)
  • 1 1/2 lb chicken breast, cut into bite-size pieces
  • 2 cups yellow squash, sliced into rounds
  • 1/2 cup onion, diced
  • 1 tsp garlic powder
  • 1/2 tsp black pepper
  • 1 can (10.5 oz) cream of chicken soup
  • 1 cup shredded cheddar cheese

Instructions

Layering the base

  1. Layer the ingredients
    Place the bite-size chicken breast pieces into the bottom of the slow cooker insert. Layer the sliced yellow squash and diced onion evenly over the chicken.
    Look for The slow cooker insert should be evenly covered with the chicken and vegetables.
    Tip Keep the chicken pieces uniform in size to ensure they cook through evenly.

At this stage, the slow cooker contains a well-organized stack of raw ingredients. The chicken pieces form a solid base, topped by the yellow squash and onion.

The arrangement should be level to ensure that the heat distributes evenly during the cooking process. Everything should look clean and ready for the seasoning and sauce to be added next.

Adding flavor and sauce

  1. Season and add sauce
    Sprinkle the garlic powder and black pepper over the squash and onion layer. In a separate bowl, mix the cream of chicken soup and shredded cheddar cheese together, then spoon the mixture over the vegetables.
    Look for The soup and cheese mixture should be spread out to cover the vegetables.
    Tip Using a spatula helps spread the thick soup mixture evenly without disturbing the layers below.

The slow cooker now features a layer of seasonings and a thick, creamy coating of soup and cheese spread over the vegetables. The garlic powder and pepper are distributed to provide a base layer of savory flavor. The mixture should look cohesive and ready to begin the transformation once the heat is applied.

Final cooking and resting

  1. Cook and serve
    Cover the slow cooker and cook on low for 4 hours. Ensure the chicken reaches an internal temperature of 165°F (74°C). Let the dish rest for 5 minutes before serving to allow the sauce to thicken.
    Look for The chicken is tender, the squash is soft, and the sauce is creamy and hot.
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Check the internal temperature of the thickest piece of chicken with a meat thermometer.

The casserole has finished its time in the slow cooker. The chicken is cooked to 165°F (74°C), and the squash is tender. The sauce is creamy and hot, having integrated the flavors of the chicken and spices. The dish is now ready to rest for five minutes, allowing the sauce to settle into a perfect consistency for serving.

Common mistakes

A common mistake is overcrowding the slow cooker, which can lead to uneven cooking and excess liquid. Ensure the ingredients are spread in an even layer as instructed. Another error is cutting the chicken pieces too large, which may result in undercooked centers.

Always use a meat thermometer to verify the temperature. Finally, avoid lifting the lid frequently during the cooking process, as this releases heat and steam, which are crucial for the proper cooking of both the chicken and the squash.

How to tell it’s done

The dish is ready when the chicken is completely opaque and tender throughout, reaching a safe internal temperature of at least 165°F (74°C). The yellow squash should be fork-tender but still hold its shape, not disintegrating into a puree.

The sauce should be smooth, thick, and bubbling around the edges of the insert. If the sauce appears too thin, let it sit for a few extra minutes; the residual heat will help it thicken slightly before serving.

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

Coming up in Part 3: common questions

  • Can this be made ahead?
  • Why does the sauce split?
  • Can this be frozen?

Also in Part 3: variations (Herb-Infused Version, Spicy Kick Variation), 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)