I know that it is real butter, and how much, because I put it there. Nor do I give control over the amount of salt to Orville or Paul or Jolly Rodger, so it really is to my taste.
If your store still stocks the popping kernels, likely well above or below the prime eye-level location, note that the 1lb. bag costs about half of the box of '8 servings.' It makes about 30 similar volume servings.
The technique outlined here will typically yield a waste of 5-12 unpopped kernels, which is far better performance than most of the microwave bags... if you try to get those last 30-50 unpopped ones by adding 15 seconds the next time, you run the risk of burning some of the popped corn and adding an unpleasant smoke flavor to the whole batch.
In a saucepan with heavy bottom and tight-fitting lid, pour just enough cooking oil to coat the bottom. (Olive oil will burn—do not use!) Pour in somewhat less than enough seed to cover the bottom; roll the pan around a bit to ensure all the loose seeds get coated with the oil. Go for high heat and stay close. As the seeds pop and build an insulating blanket above the bottom of the pan, you can cut your heat in half, then be ready, the moment you have gotten to less than a pop-per-second, to cut the gas or snatch it from the coil if using electric. Tip the popped corn into a serving bowl, then melt some butter in the bottom of the same pan and drizzle it over the corn in the bowl. I like to put salt in my palm to judge the amount, before dusting the surface of the fresh hot steamy stuff in the bowl. I use my table knife to stir popcorn up from the bottom and mix it with the dredged and salted stuff on the top.You will come to judge how much of each item with time. I like a TBS of butter and 1/8 tsp. of salt for a batch scaled to my 6 qt. saucepan, which yields two very generous servings. In a smaller saucepan, one which is shorter than 5 inches, don't cover the entire bottom of the pan with seed unless you like the thrill of having the batch lift the cover off the top, and maybe a few escapees catching fire before you finish.
On a gas stove, you will be using substantially less energy than microwaving a batch, but with an electric stove you will use more.
I don't serve it with napkins, unless asked. Just as I regard popcorn as a vehicle for ingesting salt and butter, I would consider not licking it off the fingers to be an inexcusable waste! I am left with a pan, serving vessel and knife to clean, but if they are added to the next batch, the added energy consumption—carbon foot print and my own animal energy—is negligible.
