Heat the oven: Preheat to 375°F (190°C).
Lightly grease a small baking dish or oven-safe skillet (about 1–1.5 quarts).
Soften the base: In a mixing bowl, beat the softened cream cheese until smooth. Stir in sour cream and mayonnaise until creamy.
Add flavor: Mix in Old Bay, lemon juice, Worcestershire, Dijon, minced garlic, a few dashes of hot sauce, and a pinch of black pepper. Taste and adjust seasoning before adding crab.
Fold in cheese and herbs: Stir in about 3/4 cup shredded cheese, most of the green onions, and parsley.
Reserve the rest for topping.
Add the crab: Gently fold in the crab meat. Keep the lumps intact for the best texture. Avoid overmixing.
Transfer and top: Spread the mixture evenly in the prepared dish.
Sprinkle the remaining shredded cheese and a pinch of Old Bay on top.
Bake: Bake for 20–25 minutes, until hot and bubbling at the edges and lightly golden on top.
Finish and serve: Let it sit for 5 minutes. Garnish with remaining green onions and a little parsley. Serve warm with your favorite dippers and lemon wedges.