01 - Add chicken, carrots, celery, onion, garlic, chicken broth, thyme, parsley, salt, and black pepper to the slow cooker. Stir gently to mix.
02 - Cover and cook on low for 5 hours until chicken and vegetables are tender.
03 - Melt 2 tablespoons butter in a small saucepan over medium heat. Stir in 3 tablespoons flour and cook for 1 minute. Gradually whisk in cream until smooth and thickened, then remove from heat.
04 - Use two forks to shred the chicken directly in the slow cooker.
05 - Stir the prepared cream sauce into the slow cooker mixture to combine.
06 - In a bowl, combine flour, baking powder, and salt. Cut in cold butter until mixture resembles coarse crumbs. Stir in milk just until combined, avoiding overmixing.
07 - Drop tablespoon-sized portions of dumpling dough over the stew in the slow cooker.
08 - Cover and cook on high for 45 to 60 minutes until dumplings are cooked through and fluffy.
09 - Taste and adjust seasoning as needed before serving.