01 - Combine chicken thighs, diced onion, sliced carrots, celery, minced garlic, dried thyme, dried parsley, black pepper, salt, and chicken broth in the slow cooker. Stir thoroughly to distribute ingredients evenly.
02 - Cover slow cooker and cook on low setting for 5 hours until chicken becomes very tender and vegetables are soft.
03 - Remove cooked chicken from the slow cooker and shred using two forks. Return shredded chicken to the pot.
04 - Stir heavy cream and butter pieces into the slow cooker until butter melts and mixture is well combined.
05 - In a medium bowl, whisk together flour, baking powder, and salt. Add melted butter and milk, stirring until just combined. Do not overmix. Fold in fresh parsley.
06 - Drop spoonfuls of dumpling dough, approximately 2 tablespoons each, onto the surface of the hot stew.
07 - Cover and cook on high setting for 45 to 60 minutes, until dumplings are puffed and completely cooked through.
08 - Taste the stew and adjust seasoning as needed. Serve hot, garnished with additional fresh parsley if desired.