Malt extract is concentrated sugar extracted from brewing-grade malted barley and comes in both dried (powder) and liquid (syrup) forms. Extract lets brewers skip the mashing process needed to brew with grains and takes you straight to the boil.
Various types of malt extract are available, such as pale, wheat, and amber. Today you’ll even find specialty extracts like rye and Maris Otter. The specific type to use in a brew depends on the desired style of beer.
Malt extract is made by mashing grains to make wort. The wort is then concentrated from its original gravity to a thick syrup by evaporation under gentle heat, typically under vacuum