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Dinner · Part 2 of 3: Instructions

Slow Cooker Garlic Butter Mushroom Chicken Thighs Step-by-step instructions

A plate of slow-cooked chicken thighs topped with sautéed mushrooms in a rich garlic butter sauce.
Prep
Cook
Total
Serves
6
Includes 5 min resting

Before you start

Before beginning, ensure your workspace is clean and organized. Have your chicken thighs ready, and thoroughly wash and slice the mushrooms if they are not pre-sliced. Ensure your garlic is finely minced and your parsley is chopped.

Prepare a small pitcher to mix the butter and broth, and ensure your slow cooker basin is clean and dry. Having all ingredients measured and ready to assemble will make the process smooth and efficient.

Ingredients at a glance (6)
  • 6 pieces boneless skinless chicken thighs
  • 1 lb sliced white mushrooms
  • 4 cloves minced garlic
  • 1 tbsp chopped fresh parsley
  • 4 tbsp melted unsalted butter
  • 1/2 cup chicken broth

Instructions

Layering the Ingredients

  1. Prepare the Slow Cooker
    Place the boneless skinless chicken thighs into the basin of the slow cooker, ensuring they are arranged in an even layer to promote uniform cooking throughout the process.
    Look for Chicken is arranged in a single layer
    Tip Avoid overlapping the chicken too much to ensure even heat distribution.

At this stage, your slow cooker should be neatly packed with the chicken at the bottom and the mushrooms and herbs layered on top. Ensure the chicken thighs are not bunched up. The arrangement should be balanced, providing a stable foundation for the liquid ingredients that will be added next. Everything should look fresh, organized, and ready for the slow-cooking process to begin.

Adding the Liquid Base

  1. Add Mushrooms and Aromatics
    Heap the sliced white mushrooms over the chicken, then evenly distribute the minced garlic and chopped fresh parsley over the top of the mushroom layer.
    Look for Vegetables and herbs are spread evenly
    Tip Fresh garlic provides a better flavor than jarred minced garlic.

Once the butter and broth mixture is poured over the ingredients, the slow cooker will contain a flavorful base that will slowly braise the chicken. The liquid should settle around the ingredients without submerging them entirely. Check that the aromatics are evenly distributed so that the garlic and parsley flavor the entire dish consistently as the steam builds and the cooking begins.

Slow Cooking to Perfection

  1. Pour and Cook
    Combine the melted butter and chicken broth in a small pitcher, then pour the mixture over the ingredients. Cover and cook on low for 4 hours until the chicken reaches 165°F (74°C). Allow the chicken to rest for 5 minutes before serving.
    Look for Chicken is tender and cooked through
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Check the internal temperature with a meat thermometer.

After four hours, the kitchen should be filled with a savory, buttery aroma. The chicken will be tender, and the mushrooms will have softened significantly.

Check that the sauce has a rich consistency and that the chicken is fully cooked. The final result should be a beautiful, cohesive dish where the chicken is coated in a glossy, savory garlic butter sauce, ready for immediate serving.

Common mistakes

A common mistake is overcrowding the slow cooker, which can prevent heat from circulating properly and lead to unevenly cooked chicken. Ensure the thighs are in a single layer.

Another error is using too much liquid; the mushrooms will release a significant amount of moisture, so stick to the recommended amount of broth to avoid a sauce that is too thin or watery. Finally, do not skip the resting period, as it allows the juices to redistribute, keeping the chicken moist.

How to tell it’s done

The chicken is perfectly done when it reaches an internal temperature of 165°F (74°C) measured at the thickest part. The meat should be opaque throughout and tender enough to be easily pierced with a fork.

The sauce will have reduced slightly, appearing glossy and rich with a distinct garlic and mushroom aroma, while the mushrooms should be soft and fully integrated into the buttery broth.

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

Coming up in Part 3: common questions

  • Can the chicken be cooked on high heat to save time?
  • Why does the sauce appear watery after cooking?
  • Is it necessary to brown the chicken before putting it in the slow cooker?

Also in Part 3: variations (Creamy Mushroom Chicken, Spicy Garlic Mushroom), 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)