mineral based makeup

How much are you using?
You really only need the tiniest bit. Tap a very small amount into the lid, swirl your brush around in it, tap off the extra and then buff it into your skin. If it looks too light then add a bit more. But really, you only need a little bit.

Bare Minerals has a bunch of short "How To" videos on their website, but almost all the MMU makers have some sort of application tips you can check out.

If it still feels too heavy for you, you can always try another formula or another brand....