Ibus

In today’s hop-forward beers, whirlpool additions contribute many of the IBUs—yet the results are less clear-cut than adding to the boil. Research—some new, some not-so-new—may provide direction.

It used to seem so simple—know your hops and when you add them to the boil, and you’ll know how bitter your beer will be. Now, thanks to IPA’s evolution and lots of new research, bitterness is getting … complicated. Here are key takeaways to help you dial it in.