Note: This recipe requires 2 hours of chilling time for the dough, so be sure to plan ahead!
Combine Dry Ingredients: In a medium-sized mixing bowl, whisk together flour, pumpkin pie spice, baking powder, and salt. Set aside.
Mix Wet Ingredients: In a large mixing bowl, add both sugars and whisk until well combined.
Add Butter & Vanilla: Pour in the melted butter and vanilla. Whisk for 20 seconds until well combined.
Add Eggs: Add eggs one at a time, whisking for 10 seconds after each addition.
Incorporate Dry Ingredients: Add half of the flour mixture and whisk until just combined. Add the remaining flour mixture and use a rubber spatula or wooden spoon to mix until a soft, pliable dough forms.
Chill the Dough: Cover the bowl with plastic wrap and transfer to the fridge to chill for 2 hours.
Preheat the Oven: While the dough is chilling with 30 minutes remaining, preheat the oven to 356ºF (180ºC) fan-forced. Line a large baking sheet with parchment paper and set aside.
Prepare Powdered Sugar for Rolling: Sift the powdered sugar into a small bowl and set aside.
Shape Cookies: Remove dough from the fridge. Scoop up 1 tablespoon (35g) of dough and roll it into a smooth ball. TIP: Roll the dough quickly to keep it cold.
Roll in Powdered Sugar: Place the ball in the powdered sugar and roll it around until completely covered. TIP: Roll generously to achieve the best crinkle results.
Bake Cookies: Place the balls on the lined baking sheet, leaving a 2-inch gap between each cookie for spreading. Bake for 10-12 minutes, until cracks have appeared and the edges look solid. The tops and middle will still look soft but will firm up as they cool.
Cool on Tray: Remove from the oven and allow the cookies to cool on the sheet for 5 minutes.
Transfer to Wire Rack: Carefully transfer the cookies to a wire rack to cool completely or enjoy them warm from the oven!