Measure Precisely: To get exact level cup measures of sugar, spoon sugar into dry metal or plastic measuring cups, then level by scraping excess sugar from top of cup with a straight-edged knife.
At altitudes above 1,000 feet, increase processing time as indicated. 1,001 to 3,000 feet: Increase processing time by 5 minutes. 3,001 to 6,000 feet: Increase processing time by 10 minutes. 6,001 to 8,000 feet: Increase processing time by 15 minutes. 8,001 to 10,000 feet: Increase processing time by 20 minutes.
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.