Serve with tortilla chips, raw vegetables, crackers or warm potato skins for dipping. Courtesy of Alison Kent.
In food processor, blend cream cheese, blue cheese, sour cream and mayonnaise; scrape into deep 9-inch (23 cm) pie plate; smooth top. Sprinkle with half of the onions.
In bowl, combine chicken and hot sauce; spoon over cream cheese mixture to within 1-inch (2.5 cm) of edge.
Bake in preheated 375°F (190°C) oven for 10 minutes. Top with Cheddar cheese and remaining green onions; continue baking until puffed around edges and Cheddar cheese is melted, about 10 minutes.
Tip: This can also be made without a food processor and by combining and stirring all ingredients together with a wooden spoon.