How to Measure Precisely
To get exact level cup measures of sugar, spoon sugar into metal or plastic measuring cup, then level by scraping excess sugar from top of cup with a straight-edged knife.
Sour Plum Jam
Omit lemon juice. Substitute sour plums for the sweet plums, and increase the prepared fruit to 3-1/2 cups finely chopped plums.
Jam or Jelly Didn't Set?
Every once in a while, you may find that your jam does not set the way you expected. If your efforts resulted in a runny batch, try our Remake Directions
to improve your finished jam. If your jam still doesn't set, you can always use it as a glaze or syrup.