01 - Preheat oven to 400°F. Rub potatoes thoroughly with olive oil and sprinkle evenly with kosher salt. Prick each potato several times with a fork to allow steam to escape during baking. Place potatoes directly on oven rack and bake for 50 to 60 minutes until skins are crisp and a knife inserts easily into centers. Remove from oven and let cool until safe to handle.
02 - While potatoes bake, combine shredded chicken, sour cream, whole milk, 1/2 cup cheddar cheese, crumbled bacon, sliced green onions, softened butter, garlic powder, smoked paprika, black pepper, and salt in a large mixing bowl. Stir thoroughly until all ingredients are evenly distributed.
03 - Cut each cooled baked potato in half lengthwise. Using a spoon, carefully scoop out the majority of the flesh, leaving approximately 1/4-inch thick shells intact. Transfer scooped potato flesh directly into the chicken filling mixture.
04 - Mash the potato flesh into the filling mixture using a potato masher or fork until thoroughly incorporated and smooth. The mixture should be creamy and well-blended. Taste and adjust seasoning with additional salt or pepper if desired.
05 - Spoon the filling mixture back into each reserved potato shell, mounding slightly above the edges. Place stuffed potatoes on a baking sheet. Sprinkle the remaining 1/2 cup cheddar cheese evenly over the tops of all stuffed potatoes.
06 - Return baking sheet to 400°F oven and bake for 15 to 20 minutes until cheese is completely melted and lightly golden. Remove from oven, sprinkle with chopped fresh parsley, and serve immediately while hot.