I got a great recipe for BIF bars, using peanut butter and dates as the base.  It is a great energy food that keeps well in the pack.  I've used figs in place of dates for similar effect.  It goes really well with a bag of granola type trail mix.  Just watch out for black bears on the trail when you open it. 
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)