• Beat butter and sugar until light and fluffy.
• Add egg and vanilla, mixing until smooth.
• Gradually mix in flour, baking powder, and salt until dough forms.
• Divide dough into two discs, wrap, and chill at least 1 hour.
• Preheat oven to 350°F and line baking sheets with parchment paper.
• Roll out dough on a floured surface to 1/4-inch thick. Cut into Christmas tree shapes.
• Bake 8–10 minutes until edges are just set. Cool completely before icing.

Glaze Icing

• Whisk powdered sugar, milk, and corn syrup until smooth.
• Divide into bowls and tint with green (for trees) and yellow (for stars), or other colors as desired.
• Adjust consistency: thicker for outlining, thinner for flooding.
• Decorating Christmas Tree Cookies
• Outline tree shapes with green glaze, then flood the centers and let set slightly.
• Pipe zigzags of white glaze to mimic garland.
• Add sprinkles or small candies as “ornaments” while icing is still wet.
• Finish with a yellow star at the top (using icing or a small candy).
• Let cookies dry on a rack until icing is set.