Set oven temperature to 375°F (190°C).
In a large bowl, mix together cream cheese, sour cream, mayonnaise, garlic powder, onion powder, hot sauce, bacon, green onions, parsley, and half of the cheddar cheese, keeping the rest of the cheddar for the top.
Move the mixture into a pie dish or casserole.
Scatter the remaining cheddar cheese over the surface; set aside a small amount of extra cheddar to sprinkle after baking if you like.
Bake at 375°F (190°C) for 20–25 minutes, until the cheese is melted and bubbling.
Take out of the oven.
Top with more cheddar cheese and green onions; serve right away with crackers, vegetables, or chips as desired.
Serve hot.