In a large bowl, combine cream cheese, butter, and mayonnaise thoroughly.
Add ¼ cup Parmesan cheese, hot sauce if using, garlic powder, Worcestershire sauce, lemon juice, and salt. Fold in the crab meat.
Transfer the mixture to an ovenproof dish. Mix remaining Parmesan cheese and breadcrumbs, then sprinkle the mixture on top of the dip. You can refrigerate this for 3–4 hours before baking.
When ready to bake, preheat oven to 325°F.
Cover dish containing the dip with aluminum foil and cook covered for 15 minutes. Remove cover and cook until the top is slightly browned and the dip is bubbling hot all over, about 10 minutes. Serve warm with sliced bread, crackers, or sliced crudités.