Mango Graham Freezer Cake is a delicious combination of fresh mango in a sweet milk filling layered between graham crackers. There’s something irresistible about the combination of tropical fruits and the sweet milk. Mango Graham Freezer Cake is simple, delicious, and refreshing. It can also be made ahead of time and stored, covered in the freezer for up to a month until you are ready to serve it. Unfortunately, it never lasts that long around my house. The still frozen cake disappears, one piece at a time, from our freezer.