Set out a large 6-8 quart slow cooker. This will accommodate all the ingredients and allow for even cooking. Ensure it’s clean and ready for use.
Next, take a large skillet or sauté pan and place it on the stovetop over medium heat. Add butter to the pan and let it melt slowly.
Once the butter is melted, add the chopped onion, celery, carrots, and minced garlic. Stir them together and sauté for about 2 to 3 minutes until they start to soften and become aromatic.
Now, add the flour to the skillet. Stir continuously for another 2 to 3 minutes until the flour takes on a golden-brown color. This step helps to create a roux that thickens your broth later.
Once the mixture is golden, turn off the heat and carefully scoop it into your slow cooker.
Next, add the pieces of chicken into the slow cooker. Let’s make sure it’s well distributed throughout the vegetables. This will ensure even cooking.
Pour in the chicken broth over the mixture, making sure everything is submerged. Sprinkle the tops of the chicken with poultry seasoning, salt, and pepper. Stir gently to combine.
Cover and cook the chicken on LOW for 4 to 6 hours, or on HIGH for 2 to 3 hours. You want the chicken to be fork-tender, so it shreds easily.
Once the chicken is cooked, use forks to shred it into bite-size pieces right in the slow cooker, leaving it in the broth.
If you initially cooked on LOW, turn the crockpot to HIGH now so that the edges simmer gently. This will help the flavors mingle.
Open the can of buttermilk biscuits. Roll each biscuit flat and use kitchen shears to cut them into six wedges. This will create your dumplings.
Gently stir the biscuit wedges into the crockpot. Be careful not to stir too vigorously; you don’t want them to break apart. Just ensure they are coated in the broth.
Cover the slow cooker and let the Chicken and Dumplings cook for another 60 to 90 minutes. The dumplings will absorb the liquid and thicken the gravy as they cook, becoming soft and fluffy.
When everything is ready, sprinkle fresh parsley on top for a pop of color and freshness. Serve warm and enjoy!