In a large bowl, combine cream cheese, sour cream, mustard, hot sauce, sour cream, cheddar cheese, and parmesan cheese. Beat with an electric mixer until well combined
Fold the crab meat and half of the green onions into the cream cheese mixture.
Transfer the mixture to a baking dish. Sprinkle the remaining Cheddar and parmesan.
Bake for 15 minutes at 350º Fahrenheit or until the cheese has melted.