Samantha Bartholomew, MS, RDN, said that her favourite low-carb dessert to buy from Amazon is Perfectly Free Frozen Bites. "They are all-natural, delicious, and portion-controlled at only 30 calories per bite and only five grams of carbs. They're the perfect low-carb, non-dairy alternative to ice cream." She especially likes Salted Caramel Vanilla ($35 for six packs).