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Foolproof 5-Ingredient Sugar Cookie Icing That Dries Hard and Glossy

Close-up of sugar cookies topped with smooth, white cookie icing decorated with delicate snowflake patterns.
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Learn how to make the best sugar cookie icing that hardens perfectly for detailed decorating. This easy recipe results in a smooth, durable, and glossy finish ideal for holiday cookies and gifting.

Ingredients

Scale
  • 2 cups confectioners’ sugar, sifted
  • 3 tablespoons meringue powder
  • 6 tablespoons warm water
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon clear vanilla extract (optional, for pure white color)

Instructions

  1. In a medium bowl, whisk together the sifted confectioners’ sugar and meringue powder until fully combined.
  2. Add the warm water and extracts to the dry ingredients.
  3. Using an electric mixer on low speed, mix until the ingredients are just combined. Scrape down the sides of the bowl.
  4. Increase the mixer speed to medium-high and beat for 5 to 7 minutes until the icing is very smooth, glossy, and holds stiff peaks. This is your piping consistency.
  5. To achieve a thinner ‘flood’ consistency for filling in large areas, add water one teaspoon at a time until the icing slowly falls from the whisk in a ribbon that disappears into the bowl after about 10 seconds.
  6. Divide the icing into separate bowls for coloring, if desired. Add gel food coloring sparingly and mix until the color is uniform.
  7. Use the stiff icing for outlining cookies and the thinner icing for flooding. Let the outlined layer dry for 15 to 30 minutes before flooding.
  8. Allow the decorated cookies to dry completely at room temperature for several hours, or overnight, until the icing is hard to the touch.

Notes

  • For a pure white, bakery style cookie icing, substitute clear vanilla extract for regular vanilla extract.
  • If your icing seems too thin for piping after mixing, add more sifted confectioners’ sugar, one tablespoon at a time.
  • If your icing is too thick for flooding, add water, one half teaspoon at a time, until you reach the correct consistency.
  • Store unused royal icing in an airtight container at room temperature for up to two weeks; do not refrigerate.

Nutrition

Find it online: https://hearthbite.com/easy-cookie-icing-that-dries-hard/