u/ewoksrock7

Looking at making this low sugar raspberry-peach freezer jam this summer (From the Ball Blue Book). I like things sweet so I do want to add a bit of sugar, but I'm not sure how much to add. If you've made low sugar jams, how much sugar would be enough to sweeten the jam just a bit without adding nearly as much as a full-sugar jam? Also, does the Ball low sugar pectin work well or should I try Pomona's?