Ingredients
Equipment
Method
Make and bake the cookies
- Whisk the flour, baking powder, and salt together in a medium bowl.
- In a large bowl, beat the butter and sugar with a hand mixer on medium speed until light and fluffy, about 2 minutes.
- Beat in the egg and vanilla until combined, scraping down the bowl as needed.
- Mix in the flour mixture on low speed just until a soft dough forms.
- Divide the dough into two disks, wrap, and chill for 1 hour.
- Heat the oven to 350°F.
- Line two baking sheets with parchment paper.
- Roll each dough disk between sheets of parchment to 1/4-inch thickness.
- Cut out 3-inch tree shapes and arrange them about 1 inch apart on the sheets.
- Bake for 9 to 11 minutes, rotating the sheets halfway through, until the cookies are set and their edges are just beginning to turn golden.
- Cool the cookies on the baking sheets for 5 minutes.
- Transfer the cookies to a wire rack and cool completely.
Make the marbled icing
- Beat the confectioners' sugar, meringue powder, and 4 tablespoons water in a medium bowl on low speed until combined.
- Beat on medium speed for 2 minutes until smooth.
- Add more water 1 teaspoon at a time, up to 1 tablespoon, until a ribbon of icing disappears back into the surface in about 10 seconds.
- Divide the icing among three small bowls.
- Leave one bowl white.
- Stir 1/8 teaspoon green gel coloring into each of the other two bowls.
Dip and set the cookies
- Spoon a few stripes of white and green icing into a shallow bowl and swirl them once or twice with a toothpick.
- Replenish with spoonfuls from the bowls as needed to keep the colors distinct.
- Dip the top of each cooled cookie into the marbled icing and let excess drip back into the bowl.
- Set the cookies on a wire rack until the icing is dry, about 2 hours.
Notes
For distinct marbling, swirl the icing only once or twice. Store airtight at room temperature for up to 5 days; freezer: yes—freeze undecorated cookies and ice after thawing. For a gluten-free variation, use a 1:1 gluten-free baking flour blend.
