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Easy Marshmallow Fondant for Cake Decorating

A smooth, white ball of freshly made marshmallow fondant dusted with powdered sugar on a marble surface.

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Make pliable, tasty homemade fondant using marshmallows for decorating graduation cakes or other projects. This is an easy frosting alternative.

Ingredients

Scale
  • 10 oz miniature marshmallows
  • 2 tablespoons water
  • 3 cups confectioners’ sugar, plus more for dusting
  • 1 teaspoon vanilla extract
  • 1 tablespoon vegetable shortening, plus more for hands

Instructions

  1. Place the miniature marshmallows and water in a microwave-safe bowl.
  2. Microwave on high for 30 seconds, stir, and repeat in 15-second intervals until the marshmallows are fully melted and smooth. Stir well after each heating.
  3. Sift 2 cups of the confectioners’ sugar into a large bowl or the bowl of a stand mixer fitted with a paddle attachment.
  4. Pour the melted marshmallow mixture and vanilla extract over the sugar.
  5. Mix on low speed until combined. Add the remaining 1 cup of sugar gradually until the mixture forms a shaggy dough.
  6. Turn the dough out onto a clean surface dusted heavily with confectioners’ sugar.
  7. Grease your hands lightly with vegetable shortening. Knead the dough until it is smooth and pliable, adding more powdered sugar if the dough sticks.
  8. Wrap the marshmallow fondant tightly in plastic wrap and let it rest at room temperature for at least 30 minutes before rolling it out for cake decorating.

Notes

  • If you need to color the fondant, add gel food coloring to the melted marshmallow mixture before adding the sugar.
  • If the fondant becomes too stiff after resting, knead in a few drops of water or microwave it for 5 seconds to soften.
  • This recipe makes enough homemade fondant to cover a standard 8-inch round cake.

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