Ruby red grapefruit and sugar is all you need to make a slightly bitter, sweet, and tangy marmalade. Try this on toast or, for a twist, use it in any recipe calling requiring orange jam or marmalade. I have used it on meatballs and chicken wings with delicious results. Make sure you use organic grapefruit to ensure an edible zest.
Recipe Summary test
The white pith on the grapefruit strips will help solidify the marmalade as they contain vital pectin. They will also give the marmalade its signature slight bitterness.
If not using the water-bath method, allow marmalade to cool completely then store in refrigerator.