How Is Microwave Popcorn Flavoured? I want to make brown paper bags of popcorn kernels and flavouring to give as gifts, but i can't seen to get the popcorn flavouring to stick to the unpopped kernels.

How do companies that sell microwave popcorn make sure it's flavoured when it's popped in the microwave? I don't want to add anything after, just have it already flavoured when it's popped.
If you inspect any commercially sold bagged popcorn, you'll notice that one side of the bag (before it's popped) is denser than the other.  They put all the butter and flavourings on one side of the bag and it disperses as the corn pops.  The flavoring should be on the side labeled "this side up".