The ratio is 2:1 fruit to sugar So 1 pound of oranges and 8 ounces sugar.
I used the skin but I wanted to reduce its bitter qualities. I cut it into slivers and boiled it, drained and rinsed. Then I boiled it two more times draining and rinsing each time. There was no bitterness left.Wash and brush oranges. Remove skin, avoiding the pith as much as possible.
Chop oranges, using immersion blender works well. Put in pan with sugar. Add skins after you have done the boil and rinse routine 3 times.
Boil everything for about 45 minutes. It will thicken over time. Cook up to one hour. The mixture should be a third of what you started with Put into a jar let cool overnight. Refrigerate the next day.
