Line a 9-inch pie plate with the pie crust. Trim and flute the edge.
In a large bowl, combine the sugar and cocoa. Add the remaining ingredients and stir just until combined. Pour the mixture into the pastry shell.
Bake for 50 to 55 minutes or until the top is puffed and a knife comes out clean. The pie won't really appear that it's set, but it will firm-up upon cooling. Cool for 1 hour on a wire rack. Then chill, covered, for 4 to 24 hours.