Step 1

Preheat the oven to 350 degrees F (175 degrees C).

Step 2

Place chicken on a large sheet of foil and sprinkle evenly with salt, pepper, and garlic powder. Wrap foil around chicken to form a pouch, sealing it around the edges. Place foil pouch on a rimmed baking sheet.

Step 3

Bake in the preheated oven for 1 hour. Remove from the oven and let stand for 15 minutes to cool slightly.

Step 4

Meanwhile, increase oven temperature to 375 degrees F (190 degrees C). Lightly grease a baking dish with cooking spray.

Step 5

Stir together cream cheese, ranch dressing, and hot sauce in a large bowl until well combined.

Step 6

Roughly chop or shred cooked chicken. Add to cream cheese mixture along with Cheddar cheese; stir to combine. Pour mixture into the prepared baking dish and sprinkle with blue cheese.

Step 7

Bake, uncovered, until bubbly and golden around the edges, about 30 minutes. Remove from the oven and let stand for 10 minutes. Sprinkle with green onions and serve.