01 -
In a large bowl, beat the softened butter and granulated sugar with an electric mixer on medium speed for 3 to 4 minutes until light and fluffy.
02 -
Add eggs one at a time, blending well after each addition. Pour in vanilla extract and mix until fragrant and uniform.
03 -
Whisk flour, baking powder, and salt in a separate bowl. Gradually add this dry mixture to the wet mixture in two batches, mixing at low speed until no streaks remain.
04 -
Separate dough evenly into two portions. Add purple gel food coloring to one and green to the other, kneading each until color is evenly incorporated.
05 -
Shape each colored dough into a ball, wrap tightly in plastic wrap, and refrigerate for at least 60 minutes to firm.
06 -
Dust countertop lightly with flour. Roll each dough ball into a 0.6 cm thick rectangle of similar size.
07 -
Place green dough rectangle atop purple one. Press lightly to adhere, then trim edges with a sharp, floured knife for clean lines.
08 -
Roll layered dough tightly into a log shape, tucking edges in as you go. Wrap in plastic and refrigerate for at least 60 minutes.
09 -
Preheat oven to 163°C. Line baking sheets with parchment paper. Slice dough log into 0.6 cm thick rounds and space 5 cm apart on sheets. Bake for 13 to 15 minutes, monitoring closely to avoid browning.
10 -
Allow cookies to rest on baking sheet for 5 minutes, then transfer to a wire rack to cool fully before serving or decorating.