Cooking Know-How
To reduce foaming in the cooked jam, add 1/2 tsp. butter or margarine to the prepared fruit mixture in stockpot along with the pectin mixture (step 3).
Altitude Chart
At altitudes above 1,000 feet, increase processing time as indicated: 1,001 to 3,000 feet-increase processing time by 5 min.; 3,001 to 6,000 feet-increase processing time by 10 min.; 6,001 to 8,000 feet-increase processing time by 15 min.; 8,001 to 10,000 feet-increase processing time by 20 min.