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Dinner · Part 2 of 3: Instructions

Slow Cooker Au Jus Chicken Thighs with Onions Step-by-step instructions

A close-up of tender, braised chicken thighs served with soft, translucent onion slices in a rich brown au jus gravy.
Prep
Cook
Total
Serves
6
Includes 5 min resting

Before you start

Before beginning, ensure your slow cooker is clean and placed on a flat, heat-resistant surface. Gather all your ingredients so they are within easy reach. If you are using a large onion, slice it into uniform half-moon shapes to ensure they soften at the same rate.

Ensure the chicken thighs are removed from the refrigerator no more than 30 minutes before you start assembling the dish to maintain food safety. Having your measuring tools and the seasoning packet ready will make the assembly process smooth and efficient.

Ingredients at a glance (4)
  • 6 boneless skinless chicken thighs
  • 1 large yellow onion, sliced into half-moons
  • 1 packet au jus seasoning mix
  • 2 cups beef broth

Instructions

Ingredient Assembly

  1. Assemble the ingredients
    Place the raw boneless skinless chicken thighs into the bottom of the slow cooker insert. Scatter the sliced onions evenly over the chicken pieces to ensure they are distributed throughout the vessel.
    Look for The chicken should be arranged in a single layer or slightly overlapping to ensure even cooking throughout the slow cooker.
    Tip Ensure the chicken is fully thawed if frozen before placing it in the slow cooker to maintain food safety standards.

At this stage, the slow cooker should be filled with the raw chicken thighs, neatly topped with the sliced onions. The ingredients are layered to allow the heat to circulate effectively.

Ensure the counter is clean and that you have followed proper hygiene practices, especially after handling raw poultry, by washing your hands and any surfaces that came into contact with the meat. The preparation should look tidy, with the onions covering the majority of the chicken to help them braise effectively in the upcoming liquid.

Seasoning and Liquid

  1. Season and liquid
    Sprinkle the au jus seasoning mix evenly over the chicken and onions. Pour the beef broth over the entire mixture, ensuring the seasoning is well incorporated into the liquid.
    Look for The broth should be poured gently to avoid splashing the seasoning out of the insert.
    Tip Whisking the seasoning into a small amount of the broth before pouring can help prevent clumping if desired.

The dish is now seasoned and covered with the beef broth. You should see the au jus mix dissolving into the broth as it is poured. This phase is complete when the liquid covers the base of the chicken and onions. Check that the seasoning is evenly distributed across the surface rather than clumped in one spot. The slow cooker is now ready to be covered and turned on, marking the start of the cooking process where the magic of the braise will begin to soften the onions and chicken.

Slow Cooking and Resting

  1. Slow cook and serve
    Cover the slow cooker and cook on low for 4 to 6 hours or on high for 2 to 3 hours. Ensure the chicken reaches an internal temperature of 165°F (74°C) before serving. Allow the meat to rest for 5 minutes before plating with the onion and gravy.
    Look for The chicken is done when it is fork-tender and the internal temperature reaches 165°F (74°C).
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Check the internal temperature at the thickest part of the thigh using a digital meat thermometer.

The cooking phase concludes when the chicken has reached an internal temperature of 165°F (74°C). The kitchen should smell savory and deep from the braising liquid. The chicken will look soft, perhaps even pulling away from the edges slightly, and the onions will be completely tender. Before serving, ensure the meat rests for at least 5 minutes. This resting period is critical for the texture of the chicken and helps the gravy settle, making the final dish look and taste its absolute best when plated.

Common mistakes

A common mistake is overcrowding the slow cooker, which can lead to uneven cooking; ensure the thighs are arranged in a single layer if possible. Another frequent error is removing the lid too often, which releases heat and drastically increases the cooking time.

Avoid using frozen chicken directly from the freezer, as it may stay in the danger zone for too long; always thaw it in the refrigerator first. Finally, failing to check the internal temperature can result in either undercooked or overcooked meat, so always rely on a thermometer.

How to tell it’s done

The chicken is perfectly cooked when it is tender enough to be easily pierced with a fork and shows no pink in the center. Use a digital meat thermometer inserted into the thickest part of the thigh; it must reach an internal temperature of at least 165°F (74°C).

The onions should be translucent and soft, and the sauce should have a rich, brown color and a slightly thickened consistency. Always allow the chicken to rest for at least 5 minutes before serving to ensure the juices redistribute throughout the meat.

  • 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?
  • Is it necessary to brown the chicken before slow cooking?
  • How can the gravy be thickened if it is too thin?

Also in Part 3: variations (Mushroom Au Jus Chicken, Garlic Herb 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)