Preheat the Blackstone Grill over high heat (approximately 500 degrees F).  The grill has to be hot to pop the popcorn.

Place the butter in a small saucepan and place it on one side of the grill.

Place the popcorn kernels in a small mixing bowl.  Add half the oil and stir to coat the kernels in the oil.

Spread the remaining oil out on the Blackstone grill with a spatula.

Spread the popcorn kernels onto the grill in an even single layer and immediately cover it with a dome.  Move the dome continuously so that the kernels and the popcorn kernels do not burn.  We moved the dome in a circular motion to make sure that all the kernels are moved around so that they do not burn.

Continue to cook for 2-3 minutes until all the popcorn kernels have popped.  You will know that the popcorn is ready when you stop hearing the kernels pop.

Use a spatula to remove the popcorn from the grill to a separate bowl.  Pour the melted butter from the grill on top and season it with the salt.

Serve immediately while warm and enjoy!