We tasted a two week old liqueur next to a two month old liqueur, and the differences were very noticeable. The younger liqueur is delicious and fresh, but the older one has more complexity to it. Both are fun though! Store as long as you can, but don't feel guilty if you don't have two months to wait for this to blend.
Keyword blackberry liqueur, blackberry liqueur recipe, creme de mure, creme de mure recipe, homemade blackberry liqueur, how to make blackberry liqueur