In a mixing bowl, combine dry ingredients. Add eggs, oil, carrots and vanilla; beat until combined. Stir in pineapple, coconut and 1/2 cup nuts. Pour into a greased 13-in. X 9-in. X 2-in. Baking pan. Bake at 350! for 50-60 minutes or until cake tests done. Cool. Combine frosting ingredients in a small bowl; mix until well blended. Frost cooled cake. Sprinkle with remaining nuts. Store in refrigerator.