In a large stainless steel pot add corncobs and water. Heat to a full boil for 10 minutes.
Remove the corn cobs and using cheesecloth strain the liquid. You will need to measure 3 cups. (Original recipe said to add water to fill if you are short. I didn't want it watered down so I just boiled another two cups of water with the cobs in there again).
Put the 3 cups of corn water back into the pot and stir in the pectin. Bring to a full boil. Add your sugar and bring back to a full rolling boil.
Turn off the heat. If you have foam skim with metal spoon. If you want to add the yellow coloring add a few drops and stir it in.