Preheat the oven to 350ºF. Coat a 1 ½ quart baking dish with cooking spray and set aside.
In a large bowl, combine cream cheese, hot sauce, and ranch dressing with a spoon or hand mixer until smooth.
Add the jackfruit, cheddar cheese, green onion, and blue cheese if using and stir to combine.
Transfer the mixture to the prepared baking dish and smooth out. Bake 25-30 minutes until hot and bubbly.
Remove from the oven and serve warm sprinkled with additional blue cheese and chopped green onion if desired, alongside celery and tortilla chips for dipping.