Pop six cups of popcorn- the air popper is fine, or do stove-top. If you do bags of microwave popcorn it’s no longer frugal.
Meanwhile, combine, melt, and stir together:
4 Tablespoons melted butter
1/2 to 1 teaspoon each chili powder, garlic powder, onion powder, and salt
1/4 teaspoon paprika
Toss all over warm popcorn. Adjust the flavorings to taste- I like more of just about everything, and I sprinkle parmesan cheese over the top of it all and give the bowl a good shake.
You omit the cheese if you just want chili popcorn