Maltster's flour, is a type of flour made from malted barley grains. Malted barley is barley that has been soaked in water, allowed to germinate, and then dried in a kiln. This process activates enzymes in the barley that convert starches into sugars.
Maltster's flour is made by milling malted barley into a fine powder. It has a distinctive flavor and aroma, with hints of sweetness and nuttiness derived from the malted barley.