Spontaneous Ale aged in oak barrels with blackberries. This blend of spontaneously fermented beer is aged on blackberries. We begin brewing Coolship la Mure with Pilsner malt, 40% raw wheat, and aged whole-leaf hops. The unfermented wort is then transferred to a large shallow pan called a coolship, which allows the hot wort to mingle with wild yeast and souring microflora in the Maine air. After fermenting and aging in French oak wine barrels for over two years, we add blackberries and let it rest for an additional five months. The finished beerâs aroma exhibits hints of lime zest and an herbal, berry-like quality. The tart flavor evokes multiple facets of blackberry, including just-ripened fruit and rich, juicy berry.