In a large mixing bowl, add egg, pumpkin pie filling, pumpkin pie spice and mix until smooth.
Then, add cake mix, oats, shredded coconut and mix until combined. Don't over-mix!
Cover and chill dough for 30-45 minutes to make it easier to handle.
While the cookie dough is chilling, prepare the pumpkin spice sugar topping by mixing together granulated sugar and pumpkin pie spice in a bowl until combined.
Scoop out big spoonfuls of the chilled dough and drop them in the bowl of pumpkin spice sugar.
Roll dough in sugar and try to form them into roughly shaped balls. They don't need to be perfect.
Place them on a cookie tray, lined with parchment paper (not wax paper). Make sure they are spaced out because they will expand quite a bit while baking.
Bake at 350 degrees F for 13-15 minutes or until edges are firm and golden brown but still slightly soft in the center.
Remove tray from oven and let the cookies cool in the tray and then, enjoy!