Grease & lightly flour a 9 inch pie dish, and lay out your unbaked pie crust inside.
Preheat your oven to 350 degrees.
Sift sugar & cocoa powder together into a large bowl. Add the rest of your ingredients & beat well with a whisk. Pour chocolate pie filling into prepared unbaked pie crust. Bake for 1 hour. Check pie after 20 minutes, and wrap the pie crust edge in a little bit of tin foil to prevent excess browning.