01 - Heat vegetable oil in a large pot over medium heat. Add popcorn kernels and cover with lid. Shake occasionally until popping slows to 2 seconds between pops. Remove from heat and transfer popcorn to a large mixing bowl, discarding any unpopped kernels.
02 - In a small bowl, whisk together melted butter, granulated sugar, pumpkin pie spice, and salt until combined.
03 - Evenly drizzle the pumpkin spice mixture over the warm popcorn. Toss thoroughly to ensure kernels are well coated.
04 - In separate small bowls, melt white chocolate chips and orange candy melts using a microwave in 30-second intervals, stirring after each interval, or a double boiler until completely smooth.
05 - Drizzle both melted white chocolate and orange candy coating over the coated popcorn.
06 - Immediately sprinkle with optional sprinkles while the drizzle is still wet. Allow popcorn to rest until the drizzle sets, about 10 minutes.
07 - Break popcorn into clusters and transfer to a serving bowl or platter.