1. Combine butter and chocolate in top of double boiler; bring water to a boil.
2. Reduce heat to low; stir until chocolate melts..
3. Combine powdered sugar and hot water; add to chocolate mixture, stirring well.
4. Stir in coconut.
5. Spray a 9-inch pie-plate with vegetable cooking spray; firmly press piecrust mixture onto bottom and sides of pie-plate.
6. Cover and chill until firm.
7. Yield: One 9-inch pie shell.
8. NOTE: Crust may be filled with softened ice cream and frozen.
9. Before serving, drizzle chocolate or caramel syrup over each slice.
10. Enjoy!