According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), New Belgium Brewing Co. is working on releasing Adding Corners Cherry, an 8.8 percent ABV blended sour ale aged in bourbon barrels that previously held Leopold Bros. cherry whiskey for six months.

The sour ale will be the 21st addition to New Belgium’s Blender Project Series and will be packaged in 750ml bottles.

An email sent to the brewery was not immediately returned.