Coconut Candy Bar Cake
["4 sq. Baker's semi-sweet chocolate", "1/2 c. (1 stick) margarine or butter", "1 c. sugar", "2 eggs", "1 1/2 tsp. vanilla", "1 2/3 c. flour, divided", "3/4 tsp. baking soda", "1/8 tsp. salt", "1 c. water"]
["Microwave chocolate squares and margarine in large microwavable bowl on High for 2 minutes or until margarine is melted.", "Stir until chocolate is completely melted.", "Stir sugar into chocolate until well blended.", "Beat in eggs, one at a time, with electric mixer on low speed until completely mixed.", "Add vanilla.", "Stir in 1/3 cup of the flour, baking soda and salt. Beat in remaining flour alternately with water until well blended and smooth.", "Pour into greased and floured 9 x 13-inch baking pan. Bake in preheated 350\u00b0 oven for 30 minutes or until toothpick inserted in center comes out clean.", "Cool completely in pan or wire rack."]
["chocolate", "margarine", "sugar", "eggs", "vanilla", "flour", "baking soda", "salt", "water"]