In making this recipe, the amounts depend on how many raspberries you have. For every cup of raspberries, you’ll want to use ½ cup of sugar. Of course, you can change that if you want a more sweet, or less sweet jam. More cups of berries will equal more cups of sugar. To start with, I just put 1 cup of raspberries and half a cup of sugar, but if you’d like to make more or less you can use the simple formula to fit your amount of raspberries! If you generally enjoy your treats to be a bit less sweet, don't hesitate to put less sugar into this jam.