I have microwaved popcorn for years in brown lunch bags. I have never had any problems but I do NOT put oil in the bag. I like the freshness of popcorn made this way - none of that chemically taste I find in pre-packaged microwave popcorn. And I know exactly what I am eating...
I add butter, salt, parmesan, etc. after I cook the popcorn and toss it in a bowl. Tastes great!
__________________
|