Yeah you can this is how i smoked this stuff last time he had it and it got me absolutely hooked on crumble, i only smoke joints and now a joint just isn't the same without a touch of crumble in there lol!!
just drop a tiny few little crumbs of it onto your tobacco or flower just before you finish rolling the joint and you're good to go! you may have to experiment with how much you put in but it's really not difficult, can't go too wrong really :)
Highly recommend this it's worth every penny and you won't regret it one bit, mine just landed this morning!!