01 - Whisk together flour, baking powder, and salt in a medium bowl. Set aside for later use.
02 - Beat softened butter and granulated sugar in a large bowl until light and fluffy, approximately 2–3 minutes.
03 - Mix in the egg and vanilla extract until fully incorporated into the butter mixture.
04 - Gradually add dry ingredients to wet mixture, mixing just until a cohesive dough forms. Avoid overmixing.
05 - Divide dough into two equal discs, wrap tightly in plastic wrap, and refrigerate for at least 30 minutes.
06 - Preheat oven to 350°F. Line baking sheets with parchment paper and set aside.
07 - On a lightly floured surface, roll dough to 1/4-inch thickness. Cut out egg shapes using a cookie cutter.
08 - Place cut cookies 2 inches apart on prepared baking sheets to allow for even spreading.
09 - Bake for 8–10 minutes until edges begin to turn golden. Cool on baking sheets for 5 minutes, then transfer to wire racks.
10 - Whisk together powdered sugar, 2 tbsp milk, corn syrup, and vanilla extract. Add remaining milk gradually until thick but drizzle-able consistency forms.
11 - Divide icing into separate bowls and tint with gel food coloring to achieve desired pastel shades.
12 - Pipe or drizzle colored icing onto completely cooled cookies using piping bags or squeeze bottles. Allow icing to set fully before serving.