blender.....don't over do it tho....and only leave it on a few seconds at a time taking the actual glass part out and shaking it vigirously and putting it back for another few seconds.....until you get it as fine as you want it....the problem here is tho...that the stems and seeds will be left so you either have to deal with it or pick them aaaaaaalllllllllllllllllllllll out by hand....cuz i don't think you have a sifter