| Barrel Aged M5 | Abnormal Beer Co. | American Imperial Stout | 14.8% |
| Barrel Aged Macadamia White Chocolate Stout | Untitled Art | American Imperial Stout | 17.7% |
| Barrel Aged Macaroons Before Dying | North Park Beer Co. | American Imperial Stout | |
| Barrel Aged Mad Cow Milk Stout | Looking Glass Brewing Company | Sweet / Milk Stout | 9.0% |
| Barrel Aged Making Whoopie | Icarus Brewing Company | | |
| Barrel Aged Malevolence Chocolate Caliente | Spiteful Brewing Company | American Imperial Stout | 10.5% |
| Barrel Aged Maple Granola | Toppling Goliath | American Imperial Stout | 15.0% |
| Barrel Aged Maple MW | Cycle Brewing | English Barleywine | 11.0% |
| Barrel Aged Maple No Cake | Transient Artisan Ales | | |
| Barrel Aged Maple X | Garagiste Meadery | | |
| Barrel Aged Marfa Light | Big Bend Brewing Company | Russian Imperial Stout | 12.0% |
| Barrel Aged Maris Orange Wax | Timber Ales | English Barleywine | 12.5% |
| Barrel Aged Marris | Timber Ales | American Barleywine | |
| Barrel Aged Massive! | Gigantic Brewing Co. | American Barleywine | 13.5% |
| Barrel Aged Mastodon | Rhinegeist Brewery | Belgian Dark Strong Ale | 11.9% |