Ingredients:

  • 1 cup (225g) unsalted butter, softened
  • 3/4 cup (150g) granulated sugar
  • 1 large (50g) egg yolk, room temperature
  • 1 tsp (5ml) vanilla extract
  • 2 1/4 cups (280g) all-purpose flour
  • 1/2 tsp (3g) baking powder
  • 1/4 tsp (1.5g) salt
  • 2 cups (240g) powdered sugar, sifted
  • 3 tbsp (45ml) whole milk
  • 1 tsp (5ml) vanilla extract
  • gel food coloring

Instructions:

  1. Preheat the oven to 350°F (175°C). In a large bowl, beat the softened butter and granulated sugar on medium-high speed until pale and fluffy, approximately 3 minutes.
  2. Stir in the egg yolk and 1 tsp vanilla extract until fully incorporated.
  3. Slowly add the all-purpose flour, baking powder, and salt, mixing on low speed just until the flour streaks disappear.
  4. Line a baking sheet with parchment paper. Scoop 1 tablespoon of dough, roll into a smooth ball, and place balls 2 inches apart on the sheet.
  5. Bake for 8–10 minutes until edges are barely golden. Cool on the pan for 5 minutes before transferring to a wire rack.
  6. Whisk together powdered sugar, milk, and 1 tsp vanilla until smooth. Divide the glaze into four small bowls and add gel food coloring to each.
  7. Dip the top of each cooled cookie into the glaze and lift quickly for a domed finish. Let the glaze set for 30 minutes before serving.