01 - Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper for easy cleanup.
02 - Carefully slice the top third off the French bread loaf lengthwise. Gently hollow out the interior, maintaining a 1-inch border to create a sturdy bread shell. Reserve the removed bread for future use, such as making breadcrumbs.
03 - In a large mixing bowl, combine the shredded chicken, softened cream cheese, hot buffalo wing sauce, ranch dressing, shredded cheddar cheese, crumbled blue cheese, and finely sliced green onions. Stir thoroughly until the mixture is well incorporated and achieves a creamy consistency.
04 - Evenly spoon the prepared buffalo chicken mixture into the hollowed bread shell. Transfer the stuffed bread onto the prepared baking sheet.
05 - Bake in the preheated oven for 25 to 30 minutes, or until the filling is hot and bubbly and the bread crust is golden brown and crisp.
06 - Remove the baked bread from the oven and allow it to cool for 5 minutes. Garnish with additional sliced green onions and blue cheese crumbles, if desired.
07 - Slice the stuffed bread into portions and serve warm immediately.