Hot answers tagged bitterness
All hops contribute both aroma and bitterness in varying degrees. Grouping them into 4 hard categories is somewhat arbitrary. In general they are grouped as aroma vs bitterness, but if you wanted to you could simply use more "aroma hops" early in your boil and still end up more bitterness (and vice versa).
"Bittering hops" are those with high alpha acids that contribute more IBUs than one with less alpha acids. But a bittering hop that is not boiled for long (or added post-boil) will not contribute to high IBUs or bitterness, just aroma and flavor. You can use a so-called bittering hop for aroma and flavor and vice-versa. There may be debate on whether that ...
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