What is one of the oldest known alcoholic beverages?
Beer
Beer predates wine, with only mead surpassing it in age.
What significant societal transition is linked to the discovery of fermentation of grain?
Transition from a nomadic society to a settled agricultural society during the Neolithic Revolution.
What must happen to a grain’s starch before fermentation can begin?
It must be converted into sugar.
What are the two main aims of the brewing process?
What are the typical raw ingredients required for brewing beer?
What qualities do hops provide to beer?
What does the Bavarian Purity Law (Reinheitsgebot) codify?
The three ingredients authorized for beer production: barley, hops, and water.
What was unknown at the time the Bavarian Purity Law was established?
The action of yeast in fermentation.
What is the first step in the modern brewing process?
Create the malted barley, or malt.
How long is barley steeped in water to promote germination?
Approximately two days.
What enzyme is produced during the germination of barley?
Amylase.
What does amylase convert the starchy carbohydrates into?
What happens to the ‘green malt’ after it is produced?
It is roasted with hot air in a kiln to suppress further growth.
What determines the length and degree of roasting of the malt?
The style of beer desired.
What type of malt is used for porter-style beers?
Highly roasted black malts.
What type of malt is used for pale ales?
Pale malt, dried at low temperatures and very light in color.
What is produced after malt is ground in a mill?
Grist
Grist is the result of grinding malt, which is used in the brewing process.
What is the purpose of the mashing process?
Convert and extract sugar from the malt
The mashing process lasts one to two hours and results in wort.
What is the liquid extracted from the mashing process called?
Wort
Wort is rich in flavor, sugar, and color.
What is sparging in the brewing process?
Rinsing spent grains with fresh water
Sparging extracts additional sugar and flavor but may lead to unwanted bitterness.
What is the brew kettle also known as?
Copper
The brew kettle is where the wort is boiled with hops.
What does boiling the wort do?
Stabilizes and sterilizes the brew, darkens the color, and causes excess water to evaporate
Boiling lasts at least one hour.
What happens to hops when boiled for a long time?
Contributes more bitterness but loses aroma
Hops are added during the boiling process to impart flavor.
What is a hopback chamber used for?
To retain volatile hop aromas
Fresh hops contribute aroma when passing through the hopback before chilling.