In a large pot combine the citrus fruit peels and 1 ½ quart of water. Boil 5 minutes on high and drain.
Add the citrus fruit pulp, juice and the remaining 1 ½ quarts of water to the pot; boil 5 more minutes. Remove pot from the heat.
Cover the pot and let stand for 12 to 18 hours.
After 12-18 hours measure the fruit and liquids.
Add 1 cup of sugar for each cup of fruit mixture, stirring until the sugar is dissolved.
Bring to a boil on high heat stirring constantly, to avoid boiling over and scorching.
Turn the heat down and continue to cook on a medium heat that sustains a rapid boil until the gel point is reached.
Remove from heat when gel has been reached and skim any foam that there might be off the top with the edge of a spoon.
Ladle into prepared hot jars, leaving ¼ inch headspace and wipe the rims clean with a damp paper towel.
Place a flat lid on and put the ring on and gently tighten.
Process in a hot water bath for 10 minutes.
Recipe Expert Tips
Please practice safe canning measures! This Citrus Marmalade Recipe is adapted from the Ball Blue BookChecking for gel point
If you have a thermometer when the mixture reaches 220 degrees it has hit the gel point.
If you don't have a thermometer you can use the chilled saucer trick like I did when I discovered my rapid read thermometer died while I was making this recipe.
Place a glass saucer in the freezer. After 20 minutes of rapid boiling drip about ¼ teaspoon of marmalade on the chilled saucer. Return the saucer to the freezer. After 1-2 minutes take the saucer from the freezer and gently push at the edge of the marmalade with your fingertip. If the marmalade wrinkles up along the edge it has reached the gel stage. If it doesn't place the saucer back in the freezer and continue to boil the marmalade, checking for the jell set every 10 minutes or so. Marmalade is normally a little runnier than I care for so I let my marmalade cook a bit longer and it firmed up very nicely.