Currants are in the best condition for making jelly between June twenty-eighth and July third, and should not be picked directly after a rain. Cherry currants make the best jelly. Equal proportions of red and white currants are considered desirable, and make a lighter colored jelly.
Pick over currants, but do not remove stems; wash and drain. Mash a few in the bottom of a preserving kettle, using a wooden potato masher; so continue until berries are used. Cook slowly until currants look white. Strain through a coarse strainer, then allow juice to drop through a double thickness of cheese cloth or a jelly bag. Measure, bring to boiling point, and boil five minutes; add an equal measure of heated sugar, boil three minutes, skim, and pour into glasses. Place in a sunny window, and let stand twenty-four hours. Cover, and keep in a cool, dry place.