Reference scale, not a limit on official guideline values.
Bitterness · IBU
20–30
0306090120+
Measured bitterness; perceived bitterness is described in the guideline below.
Brewers Association 2026 · Printed guideline page 39 · PDF page 48. Color graphics are illustrative.
The guideline, in detail
Official style attributes, including what may be present and what should be absent.
Malt aroma & flavor
Medium to medium-high malt aroma and flavor should be present with very low to medium-high beechwood smoke aromas and flavors. Smoke flavors should be smooth, without harshness. Smoke flavor may create a perception of mild sweetness.
Hop aroma & flavor
Very low
Perceived bitterness
Medium, increasing proportionately with starting gravity.
Body & mouthfeel
Medium to full
Clarity
Appearance should be clear. Chill haze should not be present
Color
Dark brown to very dark
Fermentation characteristics
Fruity esters are usually absent, but if present should be very low. Diacetyl should not be present.
Technical specifications, including gravity
Original Gravity (°Plato) 1.066-1.074 (16.1-18 °Plato) • Apparent Extract/Final Gravity (°Plato) 1.018- 1.024 (4.6-6.1 °Plato) • Alcohol by Weight (Volume) 5.0%-6.0% (6.3%-7.6%) • Hop Bitterness (IBU) 20-30 • Color SRM (EBC) 20-30 (40-60 EBC)
Keep exploring
Other styles in this guideline group. Similar placement doesn’t guarantee a similar flavor.