Kumquat Marmalade Recipe

Cook Time:
45 mins
Cooking and testing instructions adapted from The Blue Chair Jam Cookbook.
Since the sugar content is based off of the weight of the fruit, we wrote out the recipe based off of 1 lb of kumquats to make everything easily scalable. The kumquat to sugar ratio is 1:.75. (1 cup of sugar weighs approx. 200g if you need to figure out adjustments for measuring by volume). The seeds provide the pectin for you, so make sure you don’t throw them out when squeezing the kumquats.


  • 1 pound (455g) Kumquats
  • 1 2/3 cups (3/4 lb or 340g) Sugar
  • 3 cups (710ml) Water


Day 1:

  1. Slice the kumquats in half lengthwise. Over a bowl covered with a mesh strainer, squeeze the kumquats and rub back and forth between your fingers. This will help loosen the fruit segments from the rind. Remove segments from rind and set both aside.
  2. After squeezing, wrap segments and seeds from the mesh strainers in cheesecloth. Slice kumquat rinds into thin strips. Combine cheesecloth bundle, rinds, and kumquat juice all into the same bowl, and add the 3 cups of water. Cover and set aside in refrigerator for at least 12 hours to help soften the kumquat rinds.

Day 2:

  1. Put 5 metal spoons in a flat part of your freezer for testing the marmalade at the end of it’s cooking.
  2. Put all of previous day's contents (liquid, rinds, and cheesecloth bundle) into a medium saucepan. Stir in the sugar.

  3. Bring contents up to a boil. Reduce heat to medium and boil for about 45 minutes, but it may take longer depending on your heat, pan, and quantity of kumquats. Stir occasionally to prevent the marmalade from burning.

  4. Test the marmalade. Remove it from the heat and put half a spoonful in one of the frozen spoons. Put the spoon back in the freezer for 3 minutes. Then remove and feel the bottom of the spoon. It should feel neither hot nor cold. If still warm continue freezing for another minute or so. Tip the spoon to see if the marmalade runs. If the top layer has set to a jelly consistency it is done. If it runs, continue cooking for another few minutes and test again.
  5. When finished cooking, skim off any surface foam. Let the kumquat marmalade rest for 10 minutes. Pour marmalade into one jar. Wait for a moment to see if rinds float to the top. If so, let marmalade rest for another 5 minutes. If not, then pour kumquat marmalade into the rest of the jars and process according to manufacturer’s instructions.

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