Curry Sauce: Scald milk in a medium saucepan; keep warm. Heat butter and curry powder in a large, heavy saucepan over medium-low heat until curry is fragrant, 1 to 2 minutes; do not boil or curry will burn. Add flour and stir for 3 minutes. Slowly blend in hot milk. Add Worcestershire sauce, salt and Angostura bitters. Increase heat and bring to a boil, stirring. Reduce heat to low and cook for 5 minutes, stirring occasionally.
» Crab Meat: Preheat broiler. Butter six small gratin dishes. Combine crab meat and Curry Sauce. Divide among prepared dishes. Combine breadcrumbs and melted butter in a small bowl. Sprinkle evenly over the crab meat and broil until crumbs are golden brown. Serves 6.