whats the best way to break up buds for bubble bag hash

I've got about 1.5 ounces of premature bud that hermied at week 5. It's covered with trichs, but tastes like shit. I am going to be making bubble hash soon and want to throw my bud in with the trimmings, but am not sure how to break up the buds. Would a coffee grinder grind it to fine for my bags? Any help would be greatly appreciated.
 
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