Add the chopped celery, onions, thyme and garlic to the drippings in the dutch oven and cook until the vegetables are soft. This will take about 5 to 7 minutes.
Add 8 cups of water and 2 cups of chicken stock in with the vegetables.
Shred the chicken with a fork (discard the bones and skin) and add it back to the dutch oven. Add the bay leaves too.
Bring the mixture to a simmer and cook about another 20 to 30 minutes until the chicken is fully cooked.
While that is simmering, whisk together a ½ cup of flour and 2 cups of the cooking liquid to create a thickening sauce. Slowly mix a little bit of this paste back in the pot a tablespoon at a time until it all dissolves. The soup mixture will thicken in about 8 to 10 minutes.
Next you will make the dumplings.
In a separate bowl, mix the remaining 2 cups of flour, baking powder, baking soda, salt, pepper and parsley. Then add the melted butter and buttermilk to the dry mixture and stir. The dough will get a bit thick.
Finally, spoon out small portions of the dough into the broth mix in the dutch oven. I evenly distributed about 8 to 10 spoonfuls. Simmer another 12 to 15 minutes until the dumplings are firm. Serve warm.
Dropping heavy, dense dough straight into boiling liquid causes the exterior to gelatinize instantly while the center remains raw, ruining the texture of homemade dumplings. Understanding how leavening agents react with acidic dairy prevents this dense outcome entirely. Buttermilk provides the necessary acidity to activate baking soda quickly, releasing carbon dioxide bubbles that expand inside the flour matrix to create a light, buoyant crumb. When forming the dough, mix only until the dry pockets disappear; overworking develops excessive gluten strands that yield chewy, rubbery dumplings rather than tender pillows.
Incorporate cold buttermilk straight from the refrigerator to slow down the initial acid-base reaction until the dough hits the hot broth.
Whisk flour and warm cooking liquid thoroughly in a separate bowl to eliminate lumps before introducing the thickening paste back into the main pot.
Simmer the uncovered dutch oven gently during the final 12 to 15 minute dumpling cooking phase to prevent the steam from escaping too rapidly.
Pair this rich poultry stew with a sharp, vinegar-dressed endive or arugula salad to cut through the high fat content and balance the heavy starches on the palate.
Balancing the active simmering time for the shredded chicken thighs with the rapid mixing of the dumpling batter requires keeping all dry and wet ingredients measured nearby before turning on the heat. Achieving the ideal velvety consistency in the broth relies on starch gelatinization operating within a steady temperature range between 180 degrees Fahrenheit and a low simmer.