If someone in your household eats all the tasty marshmallow bits out of the Lucky Charms box, leaving you with the cardboard-like cereal, here’s how you get even. Amazon sells a 3 pound bag of dehydrated marshmallows for $30. Reviewers note they taste pretty much the same as the ones that come in the Lucky Charms box, and you can shovel these in by the fistful without the silly cereal taking up space.