1. Preheat oven to 350°F. Grease and flour an 8-inch square baking pan.
2. Combine the flour and salt; set aside.
3. Stir together the melted butter and brown sugar until smooth; beat in egg and vanilla extract until well blended.
4. Slowly beat in the flour mixture until blended, then stir in the coconut and chocolate chips.
5. Scrape the batter into the prepared pan and smooth even with a rubber spatula.
6. Bake for 25-30 minutes, or until set in the center but still soft. Do not overbake. Let the bars cool slightly before drizzling with chocolate, then cool completely before cutting into squares.
7. For the topping, combine the chocolate and butter in a small bowl and microwave in 30-second intervals until melted and smooth. Using a spoon, drizzle over the bars.