| Butchertown Black Ale | Speakeasy Ales and Lagers | Black IPA | 8.0% |
| Buteo's Brulee | Horus Aged Ales | American Imperial Stout | 15.0% |
| Butta Cup | Funky Buddha Lounge and Brewery | American Brown Ale | 8.8% |
| Butter | Other Half Brewing Co. | American IPA | 6.8% |
| Butter Pecan Maple Barrel Stout | Central Waters Brewing Company | American Stout | 10.5% |
| Butterfinger Brown | Justice Brewing | | |
| Butterfly Effect | Brouwerij Frontaal | Imperial IPA | 7.5% |
| Butterfly Pea Kombucha Meerts | Funk Factory Geuzeria | Fruit Lambic | 3.5% |
| Butterfly Scratch | Mumford Brewing | American IPA | 6.6% |
| Butternut Squash Ale | Ratchet Brews | Pumpkin Beer | |
| Butters Bottom Batch | Inside the Five | | |
| Butterscotch Toffee Stout | The Hideout Brewing Company | English Stout | 5.6% |
| Butthead Doppelbock | Tommyknocker Brewery and Pub | Doppelbock | 8.2% |
| Butty Bach | Wye Valley Brewery | | 4.5% |
| BuWoo | Bellwoods Brewery | | 6.4% |