
ギネスで知られるダーク・ビール。表面が黒くなるまで焙煎を高めた麦芽または大麦を用いた濃厚なビールで、色はほぼ黒である。もともとはイギリス発祥のポーターが元になっており、アイルランドに輸出されギネスの創設者が生産を始めたが、ポーターよりも濃く黒い、比重の重いビールとして人気が高まり広まっていった。
アメリカで作られるスタウトは、オリジナルよりもアルコール度数が高く(5.7-8.0%位)、ホップの存在感による苦味・アロマが若干あり、オリジナルのアイリッシュスタイルよりも更にフルボディである。
スタウトには、ドライスタウト、バルティック・ポーター、ミルクスタウト、インペリアルスタウト等のタイプに分かれる。
<参考リンク>
https://www.craftbeer.com/styles/irish-style-dry-stout
https://www.webstaurantstore.com/article/27/different-types-of-beers.html#stout
<このビールスタイルのBrewers Associationによる解説>
Classic Irish-Style Dry Stout
- Color: Black
- Clarity: Opaque
- Perceived Malt Aroma & Flavor: The prominence of coffee-like roasted barley and a moderate degree of roasted malt aroma and flavor defines much of the character. The hallmark dry-roasted attributes typical of Dry Stout result from the use of roasted barley. Initial malt and light caramel flavors give way to a distinctive dry-roasted bitterness in the finish.
- Perceived Hop Aroma & Flavor: European hop character may range from not present to low in aroma and flavor
- Perceived Bitterness: Medium to medium-high
- Fermentation Characteristics: Fruity esters are low relative to malt and roasted barley as well as hop bitterness. Diacetyl is usually absent in these beers but may be present at very low levels. Slight acidity may be present but is not required.
- Body: Medium-light to medium
- Additional notes: Head retention should be persistent
Original Gravity (°Plato) 1.038-1.048(9.5-11.9 °Plato) •
Apparent Extract/Final Gravity (°Plato) 1.008-1.012(2.1-3.1 °Plato) •
Alcohol by Weight (Volume) 3.2%-4.2%(4.1%-5.3%) •
Bitterness (IBU) 30-40 •
Color SRM (EBC) 40+(80+ EBC)
American-Style Stout
- Color: Black
- Clarity: Opaque
- Perceived Malt Aroma & Flavor: Coffee-like roasted barley and roasted malt aromas are prominent. Low to medium malt sweetness with low to medium caramel, chocolate, and/or roasted coffee flavor should be present, with a distinct dry-roasted bitterness in the finish. Astringency from roasted malt and roasted barley is low. Slight roasted malt acidity is acceptable.
- Perceived Hop Aroma & Flavor: Medium to high, often with citrusy and/or resiny hop qualities typical of many American hop varieties.
- Perceived Bitterness: Medium to high
- Fermentation Characteristics: Fruity esters are low. Diacetyl is usually absent in these beers but may be present at very low levels.
- Body: Medium to full
- Additional notes: Head retention should be persistent
Original Gravity (°Plato) 1.050-1.075(12.4-18.2 °Plato) •
Apparent Extract/Final Gravity (°Plato) 1.010-1.022(2.6-5.6 °Plato) •
Alcohol by Weight (Volume) 4.5%-6.4%(5.7%-8.0%) •
Bitterness (IBU) 35-60 •
Color SRM (EBC) 40+(80+ EBC)