Select the right pot: Choose a heavy-bottomed pot with a tight-fitting lid, approximately 3-4 quarts in size.
Heat the oil: Place the pot over medium-high heat and add the oil. Heat the oil until it's shimmering, about 2-3 minutes.
Test the temperature: Add 2-3 test kernels to the hot oil. When those kernels start to pop, you'll know the oil is at the perfect temperature.
Add the remaining kernels: Carefully pour in the remaining 1/4 cup of popcorn kernels, spreading them out in an even layer. Cover the pot with the lid, leaving a small gap for steam to escape.
Start popping: As the kernels begin to pop, gently shake the pot back and forth to prevent burning. Continue shaking until the popping slows to 2-3 seconds between pops.
Remove from heat: Once the popping has slowed, immediately remove the pot from the heat.
Season and serve: Transfer the freshly popped popcorn to a large bowl. Sprinkle with salt (or your desired seasoning) and toss to coat evenly. Serve warm and enjoy!