If you've had a long, tiring work week, a good movie, a glass of wine, and a bowl of Cinnamon Bun Popcorn is the very best way to celebrate its end!
Line a large rimmed baking sheet with foil (for easy clean up) and place on the counter.
In a small bowl, stir together granulated sugar, cinnamon, and salt.
To a large heavy-bottomed pot with a lid, add oil (if oil is in its solid state, melt over medium heat before proceeding) and 3 kernels of popcorn. Cover and heat over medium-high heat (medium if your stove runs hot) until you hear all 3 kernels pop.
Add the rest of your popcorn and shake pan for about 5 seconds to coat the kernels. Sprinkle sugar mixture over the popcorn as evenly as you can. Cover and shake for 3 seconds, rest for 3 seconds, repeat, until popcorn begins to pop steadily.
Once that starts, shake pan mostly continuously, pausing occasionally to listen for breaks in popping. Once there is about a 2-second break between pops, pull from heat. Transfer popcorn immediately to your prepared baking sheet.
In a small bowl in your microwave, heat white chocolate for 30 seconds and stir until smooth. If necessary, continue to heat in 15-second bursts and stir, until smooth.
*Vegetable or canola oil is also fine.