*While I recommend a food thermometer for this recipe, if you don't have a one you can test to see if the jam has cooked enough to set. Place a spoon in the freezer. After cooking the jam for about 18-20 minutes, remove the jam from the heat and coat the back of the frozen spoon with the jam. Give it a moment to cool. Once cool, run your finger through the jam. If a clear path is made through the jam, and no jam on the sides fill in, your jam should be ready. If not, cook the jam a little longer and retest.