Pour oil into the skillet; Use more if necessary, to coat the bottom. Add the popcorn kernels, and place the lid on the skillet.
Place over medium-low heat on the stovetop. Shake pan occasionally, until kernels begin to pop, then shake frequently until you can no longer hear kernels popping.
Remove pan from heat, uncover, and sprinkle popcorn with sea salt and melted butter if desired. Toss to coat.
Melt the white chocolate wafers according to package instructions.
Transfer the popcorn to a large serving bowl, discarding any unpopped kernels. Drizzle with white chocolate and toss to coat. Sprinkle with nonpareils.
Enjoy immediately for a warm, gooey treat or allow it to cool completely for the chocolate to harden on the popcorn.
Notes
Blue corn is sweeter and will result in more of a kettle cooked flavor. Yellow is easier to come by and will result in larger popped kernels. The oil is heated over a low to medium-low heat. If you are worried about flavor or smoke point, feel free to use vegetable oil or avocado oil. You only need enough to cover the bottom of the pan.