Fill a quart mason jar about halfway with fresh blackcurrants.  Do not mash the currants.

Add in roughly 5 ounces or 2/3 cup of sugar, lemon juice and gin.  The jar should be just about full, but if not add enough gin to fill the jar leaving 1 inch of headspace.

Allow the currants to infuse for 2-3 weeks.  Strain and enjoy!