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difference between an IPA and a Double IPA

dabeer

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Is the difference simply twice the amount of malt, and hops?
 
http://www.bjcp.org/2008styles/style14.php


Reading this, about 30% more ought to do it.  Moving from decidedly bitter and hoppy to insanely bitter, hoppy and stronger, but short of barleywines. 

Might want to mash 1-2F lower to enhance fermentation and dry-enough finish.
 
I like My IPA's around 1.070 OG, which puts them at about a 1.5 IPA as the top end of IPA is 1.075, and the bottom end of IIPA is 1.070. The higher the gravity, the less specialty malts you will need. This will avoid the "cloying" effect as well. In addition to mashing at lower temps, I'll occasionally cheat and work some sugar in as well on the really high gravity ones.
 
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