From _A Hundred Years of Island Cooking_ published by Hawaiian Electric. Preheat electric oven to 350F. In small bowl of electric mixer, combine flour, butter, and brown sugar. Mix until fine particles are formed. Stir in nuts. Reserve 1 c of mixture for topping. Press remainder into ungreased 8-in square pan. Bake for 12-15 min or until lightly browned. In small bowl of electric mixer, combine remaining ingredients. Beat well; spread over crust. Sprinkle with reserved crumb mixture. Bake for 25-30 min. Cool; cut into squares. Makes