Heat the oil in a large pot over medium heat. Add a few kernels and cover. When they pop, add the rest of the kernels and cover. Shake the pot over the heat and cook until the popping stops, about 3 or 4 minutes. Pour the popcorn into a large bowl.
2
In a small bowl, combine the butter and the truffle oil. Drizzle over the popcorn and season with salt.