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Best Sugar Cookie Frosting Recipe | Smooth Icing for Cut Out Cookies

A smooth, glossy sugar cookie frosting that pipes cleanly, floods perfectly, and dries to a soft, satiny finish. Beginner-friendly with rich butter flavor and just enough set for stacking.
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Prep Time 10 minutes
Total Time 10 minutes

Ingredients
  

Ingredients

  • Unsalted butter, softened
  • Confectioners’ sugar (powdered sugar), sifted
  • Light corn syrup
  • Pure vanilla extract (use clear vanilla for bright white)
  • Almond extract (optional)
  • Milk or heavy cream, as needed to thin
  • Fine sea salt, a pinch
  • Gel food coloring (optional)

Instructions
 

Instructions

  • Bring the butter to room temperature until soft but not greasy and sift the confectioners’ sugar to remove lumps.
  • Beat the softened butter on medium speed until creamy and light, about 2 minutes.
  • Add half of the sifted sugar and mix on low until combined, then scrape the bowl.
  • Add the remaining sugar, 1 tablespoon light corn syrup, vanilla, almond extract if using, and a pinch of salt; mix on low until incorporated, then beat on medium for about 1 minute until smooth.
  • Adjust to outlining consistency by adding milk or cream 1 teaspoon at a time until the frosting flows slowly off a spoon and a line holds for 2–3 seconds before settling.
  • For flooding, transfer some outlining icing to a separate bowl and add milk or cream a few drops at a time until an 8–10 second ribbon disappears into itself; add a tiny drizzle of corn syrup for extra shine if desired.
  • Divide icing into bowls and add gel food coloring gradually with a toothpick, stirring gently to avoid air bubbles; let rest 5–10 minutes and tap to release bubbles.
  • Transfer outlining icing to piping bags fitted with small round tips and pipe borders on cooled cookies, then flood inside the borders and nudge icing into corners; pop any visible bubbles and add sprinkles immediately if using.
  • Let decorated cookies dry uncovered at room temperature for 4–6 hours for gentle handling or overnight for stacking.

Notes

For dairy-free, use a quality dairy-free butter block and thin with non-dairy milk. If icing is too thick, add milk a few drops at a time; if too thin, add more sifted confectioners’ sugar. Avoid liquid food coloring; use gel to prevent thinning. Sifting sugar and resting colored icing help achieve a smooth, shiny finish. Store icing covered at room temperature up to 8 hours, refrigerate up to 1 week (with plastic wrap pressed on the surface), or freeze up to 2 months. Decorated cookies keep 4–5 days at room temperature once dry.