How To Harden Marshmallow Fondant

Do you struggle with your marshmallow fondant being too soft? Do your designs not hold their shape? If so, you will want to know how to harden marshmallow fondant.

Let’s get started!


01 1 package white mini marshmallows (16 ounces)

02 2-5 tablespoons water

03 2 pounds (approximately 8 cups) powdered sugar, sifted

04 1/2 cup solid vegetable shortening

05 1/2-1 teaspoon CMC or Tylose

In a microwave-safe bowl, add the marshmallows and two teaspoons of water. Microwave in 30 seconds intervals, stirring after each time.


Add 3/4 of the powdered sugar to the melted marshmallows in a large bowl. Carefully fold the powdered sugar into the marshmallows using a wooden spoon.


Generously grease a clean working space in your kitchen with shortening. Cover your hands in shortening and turn the marshmallow fondant onto your work surface.


Roll out the fondant into thin sheets. Rolling it out thin will help it harden quicker.


How To Harden Marshmallow Fondant