In a light and shallow pot, heat the oil over high heat. Wait about 3-4 minutes for the oil to heat up before adding the kernels.
Within a few minutes, the popcorn should start popping. Once the popping starts to slow down begin vigorously shaking the pan while keeping it on the heat.
Once the popping stops, remove the pan from the heat and let it sit for 1 more minute before pouring in a large bowl or paper bag.
Top with butter and salt if desired.