St Patricks Day Shamrock Cookies (Printer-friendly)

Buttery sugar cookies shaped like shamrocks and decorated with smooth, vibrant royal icing for festive occasions.

# What You'll Need:

→ Sugar Cookies

01 - 2 1/2 cups all-purpose flour
02 - 1/2 teaspoon baking powder
03 - 1/4 teaspoon salt
04 - 3/4 cup unsalted butter, softened
05 - 1 cup granulated sugar
06 - 1 large egg
07 - 2 teaspoons pure vanilla extract
08 - 1/2 teaspoon almond extract

→ Royal Icing

09 - 3 cups powdered sugar, sifted
10 - 2 large egg whites or 4 tablespoons meringue powder plus 6 tablespoons water
11 - 1/2 teaspoon vanilla extract or lemon juice
12 - Green gel food coloring

→ Decorating

13 - Sprinkles or edible glitter

# Directions:

01 - In a medium bowl, whisk together flour, baking powder, and salt. Set aside.
02 - In a large bowl, beat butter and sugar until light and fluffy, approximately 2-3 minutes.
03 - Add egg, vanilla extract, and almond extract; mix until fully combined.
04 - Gradually add dry ingredients to wet ingredients, mixing just until incorporated.
05 - Divide dough in half, shape into disks, wrap in plastic wrap, and refrigerate for at least 1 hour.
06 - Preheat oven to 350°F. Line baking sheets with parchment paper.
07 - Roll dough to 1/4-inch thickness on a lightly floured surface. Cut into shamrock shapes and place on prepared baking sheets.
08 - Bake for 9-11 minutes, or until edges just begin to turn golden. Cool on baking sheet for 5 minutes, then transfer to wire rack to cool completely.
09 - In a large bowl, beat powdered sugar, egg whites (or meringue powder and water), and vanilla or lemon juice until stiff peaks form and icing is glossy, approximately 5 minutes.
10 - Divide icing into bowls and tint with green gel food coloring to desired shade.
11 - Transfer icing to piping bags fitted with small round tips. Outline and flood cooled cookies. Decorate with sprinkles or glitter if desired. Allow icing to set for at least 1 hour before serving or packaging.

# Expert Advice:

01 -
  • The dough is forgiving and actually gets easier to work with after chilling, so even nervous bakers end up with perfect shamrocks.
  • Royal icing might sound fancy, but it's just three ingredients beaten until glossy—and the payoff is those smooth, professional-looking cookies that impress everyone.
  • You can make these days ahead and they taste even better, which means less stress on party day.
02 -
  • Cooling completely before icing is non-negotiable—warm cookies will melt the icing and turn your beautiful work into a glossy puddle, trust me on this.
  • Sifting the powdered sugar changes everything; lumpy sugar creates grainy icing no matter how long you beat it, so don't skip this single step.
03 -
  • If your royal icing gets too thick while working, add water one tiny drop at a time—it's easier to thin than to thicken, and patience saves the batch.
  • Using a combination of outline (piping) and flood (filling) technique gives you professional-looking cookies; the outline dries first and acts as a dam so the thinner flood icing doesn't spread everywhere.
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