1/2 cup sugar
I love orange marmalade but dont have the patience to follow usual recipe's. So I cut up oranges with the skin on and place them in a blender with a few tablespoons of water. After blending, pour into a pan along with 1/2 cup of sugar(I use organic) ore more and boil. Depends on how much oranges you have to how much sugar you want. Boil for 15 minutes. Cool and put into a air tight container in the fridge. Keeps for a few weeks. Extra can be froze and used for later. This is super yummy and my kids love it!
Nice thing about this is that you can control how much "chunk" factor is involved. If you dont like alot of chunks, blend longer. You like alot of chunks, blend less.
If possible, use organic oranges with this. If not, wash the orange peel really good.
I do the same with berries. They keep for weeks as well .Ive even done this with frozen peaches. Try combinations out too. You will pay about $1.50 for 1 lb of jelly compared to $2-$5 for store bought 12 oz size's.