The real secret is flavacol.
Amazon sells it in bulk, or you can get this stuff: https://www.amazon.com/dp/B00M8HPGMU/
comes in different sizes. we use the 4oz ones with our stir crazy popcorn maker.
You can buy in bulk and get cheaper with just the popping corn, carton of flavacol, and the coconut popping corn oil, but its a little more work to measure it all out. YMMV.
Best cheddar cheese powder:
https://www.amazon.com/gp/product/B008GG9ZS8/
With this salt:
https://www.amazon.com/gp/product/B004W8LT10/
And this oil:
LPT - you can pop kernels in the microwave in a brown paper lunch bag. 130 calories for 40 grams of unpopped kernels.
I spray them with a little pam, add some flavacol (0 calorie popcorn salt that tastes amazing) and boom. easy, quick, low calorie popcorn that is so much cheaper than mini bags.
a container of kernels has lasted me months and a single container of flavacol has lasted me years, and I still have at least half left over.