Choose firm, plump, dark-colored barries, avaiding berries with mold.  Attached hulled are a sign berries were picked while immature.  to store, lay a paper towel on a baking sheer; place unwashed berries in a single layer.  cover with another towel and refrigerate for up to 2 days.  Or, freeze for an hour on a baking sheet, them place in a container and freeze up to 9 months.

Do not wash blackberries until ready to use or they will became wterlogged.  If used in a cale, be sure the batter is thick or the berries will sink to the bottom.  blackberries improve with cooking, with intensifies the flavor and softens the seedy texture.