In a large mixing bowl, beat the softened cream cheese, with a hand or stand mixer, until well combined.
Add the sour cream, mayonnaise, 1 cup cheese, dijon mustard, lemon juice, cajun seasoning, and Worcestershire sauce and beat on medium-high speed until well combined. Gently fold in the crab meat with a spatula.
Transfer to a 9-inch baking pan. Sprinkle with the remaining cheese.
Bake for 25-30 minutes until hot and bubbly. OPTIONAL: For a browned and crispy crust, broil it for 2-3 minutes.
Top with green onions. Serve immediately for best results.
Notes
Note 1 - Use a mix of soft, meltable cheeses. Good options: mozzarella, Monterey Jack, pepper jack, Gruyère. If you're into parmesan cheese, throw in a 1/4 cup on top of the cheese called for above.Note 2 - The sodium content of crab varies by brand, and if you're using canned vs. fresh. Wait to add any salt until you've tasted it before baking.