For 9 Servings:
Heat oven to 350°F. Combine 1 cup flour, 3/4 cup sugar, 1/4 cup cocoa, 1 tablespoon baking powder and 1/2 teaspoon salt in medium bowl. Add 1/2 cup milk, 3 tablespoons melted butter and 1 teaspoon vanilla; mix well until smooth. Stir in 1 cup coconut. Spread batter into greased 8-inch square baking dish. Combine 1 cup hot water and 1/2 cup chocolate syrup in 2-cup glass measure. Pour evenly over batter. Bake for 32 to 38 minutes or until center is set and edges pull away from sides of pan. Let stand 15 minutes. Sprinkle with powdered sugar, if desired. Serve warm.