Nowadays, you have lots of options. If you're vegan, you can buy gelatin-free marshmallows or substitute with almond butter and maple syrup (here's a recipe for healthy vegan rice crispy treats). Or, substitute every 1 cup of marshmallows (8 pieces) with 1/2 cup marshmallow fluff (which also has no gelatin).To reduce sugar content, buy sugar-free marshmallows.