After reading several forum posts about coffee flavored brews, it appears the best is to add cold brewed coffee. It seems to me adding crushed coffee beans to the secondary would do exactly that. I was thinking of putting crushed or coarsely ground coffee beans in a muslin bag into the secondary fermenter. First of all, how does that sound to others that have made coffee flavored beers, and then how much crushed/coarsely ground beans and how long should I let them soak in the secondary?