ArticleWort Boiling & Hop Character The bitterness in beer is developed by adding hops to boiling wort. Likewise, boiling hops adds hop flavor and aroma. The bitterness keeps the beer from being too sweet and the flavorAlready a member? Log InWritten by Chris ColbyYou'll Also Like Article MEMBERS ONLY Hop Extracts - Advanced Brewing These hop extracts roughly fall into two categories, those primarily intended to add bitterness and those where aromatics are the goal. Article FREE Save Your Hops for Post-Boil Outside of bittering additions, adding hops during the boil is inefficient as many of the essential oils and positive attributes being sought are lost to heat. Instead, save those hops for whirlpooling or dry hopping.