My daughter makes this marmalade every spring when rhubarb's abundant. Our family enjoys her gift…a refreshing departure in flavor from all the berry jams and jellies. —Leo Nerbonne, Delta Juction, Alaska
Combine rhubarb and sugar in a Dutch oven. Grind oranges, including the peels, in a food processor; add to rhubarb mixture. Bring to a boil. Reduce heat and simmer, uncovered, stirring often until marmalade sheets from a spoon, about 1 hour.
Remove from heat; skim off foam. Ladle hot mixture into eight hot half-pint jars, leaving 1/4-in. headspace. Remove air bubbles and adjust headspace, if necessary, by adding hot mixture. Wipe rims. Center lids on jars; screw on bands until fingertip tight.
Place jars into canner with simmering water, ensuring that they are completely covered with water. Bring to a boil; process for 10 minutes. Remove jars and cool.
Editor's Note
The processing time listed is for altitudes of 1,000 feet or less. Add 1 minute to the processing time for each 1,000 feet of additional altitude.
