Step 1: Layer - Start by placing the chicken thighs right into the bottom of your slow cooker. Spread them out as evenly as you can. Then just toss the sliced carrots, celery, and onion right on top. No need to be fancy here—this is rustic, comforting home cooking at its best.
Step 2: Mix - In a small bowl, whisk together the chicken stock, au jus mix, chicken gravy mix, garlic powder, onion powder, and black pepper. Make sure everything is well combined so there are no dry pockets of seasoning. This flavorful gravy is going to be the star of the show!
Step 3: Pour & Cover - Pour that delicious gravy mixture right over the chicken and veggies. Give it a gentle nudge with a spoon to make sure everything is lightly coated. Then just pop the lid on the slow cooker and let the magic happen.
Step 4: Slow Cook to Perfection - Cook this on low for 6 hours or high for 4 hours. The chicken should get super tender and easy to break apart with a fork, and the vegetables will get nice and soft (but not mushy).
Step 5: Garnish & Serve - If you want, sprinkle a little parsley over the top before serving for a bright pop of color and freshness. Scoop it into bowls, making sure everyone gets plenty of that rich, flavorful gravy. Serve it up hot and enjoy!