Pour popcorn into a large serving bowl or mixing bowl.
In a small bowl, mix together the cheese powder, salt and seasonings and set aside.
Pour half of the melted butter over your popcorn, then toss to coat. Repeat with the other half, and toss again.
Sprinkle half of your cheesy herb mixture over top, then toss to coat. Repeat with the other half, and toss one more time.
Notes
I typically pop ¼ cup kernels in my silicone popcorn bowl in the microwave. Three minutes on high is the magic number for me, but the trick is to wait until popping slows to about 2 seconds between pops.