Print

No-Fail Royal Icing for Smooth, Hard Sugar Cookies

A hand holding a round sugar cookie decorated with bright, layered rainbow colors and white icing clouds, showcasing the sugar cookie icing recipe.
Print Recipe
Save Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star

No reviews

Follow these clear steps to make a reliable royal icing that dries hard and smooth, perfect for decorating cut-out sugar cookies for gifting or holidays.

Ingredients

Scale
  • 4 cups powdered sugar, sifted
  • 3 tablespoons meringue powder
  • 6 tablespoons warm water
  • 1 teaspoon vanilla extract
  • Gel food coloring (optional)

Instructions

  1. In a large bowl, whisk together the sifted powdered sugar and meringue powder until fully combined.
  2. Add the warm water and vanilla extract to the dry ingredients.
  3. Using an electric mixer (handheld or stand mixer with paddle attachment), start mixing on low speed 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 thick, glossy, and holds stiff peaks. This whipping action incorporates air, which helps it dry hard.
  5. Test the consistency: For outlining (stiff consistency), the icing should hold its shape when lifted. For flooding (thinner consistency), add water one teaspoon at a time until the icing flows slowly off the spoon and you can draw a line through it that disappears in about 10 seconds.
  6. Separate the icing into bowls for coloring, if desired. Add gel food coloring sparingly and mix until the color is uniform.
  7. Transfer the icing to piping bags fitted with small tips for outlining, or use squeeze bottles for flooding.
  8. Outline your cooled sugar cookies first. Let the outline dry for 15 to 30 minutes until firm to the touch.
  9. Flood the outlined areas with the thinner consistency icing. Gently spread with a scribe tool or toothpick if needed.
  10. Allow the cookies to dry completely, uncovered, at room temperature for 6 to 12 hours, or until the surface is completely hard and not tacky.

Notes

  • For a glossy finish, avoid over-mixing once the flooding consistency is reached.
  • If your icing cracks while drying, it may be too thick; add a few drops of water and remix gently.
  • If you are using this icing for meal planning or as part of a larger baking project, store unused icing covered tightly with plastic wrap pressed directly onto the surface to prevent crusting.
  • This recipe works well for holiday cookie decorating and can be adapted for various designs.

Nutrition

Find it online: https://delicerecipe.com/sugar-cookie-icing-recipe-hard-finish/