01 -
Combine flour, baking powder, and kosher salt in a medium bowl, whisking until evenly blended.
02 -
Using a stand or handheld mixer fitted with a paddle attachment, beat softened butter and granulated sugar on medium-high speed until pale and fluffy, approximately 2 to 3 minutes.
03 -
Add the egg and beat until fully incorporated, then blend in the almond extract on medium speed.
04 -
Reduce mixer speed to medium-low and add the dry ingredient mixture, mixing just until combined to avoid toughening the dough.
05 -
Separate the dough into two equal portions; keep one plain and thoroughly mix the other with red food coloring until desired hue is achieved.
06 -
Shape each dough portion into a half-inch thick square, wrap tightly in plastic wrap, and refrigerate for 30 minutes until firm.
07 -
Place each dough portion between two sheets of parchment paper and roll into 1/4-inch thick rectangles. Remove the top parchment sheet from both doughs.
08 -
Invert the plain dough rectangle onto the red dough and gently press to adhere, then carefully remove the remaining parchment sheet and trim edges for clean, even sides.
09 -
Starting from a long edge, use the parchment to tightly roll the layered dough into a log. Turn seam-side down and roll gently on the surface to seal. Wrap in plastic and refrigerate for at least 1 hour or overnight for optimal flavor and slicing ease.
10 -
Adjust oven racks to upper and lower thirds and preheat to 175°C. Line two large baking sheets with parchment paper and arrange sprinkles on a plate nearby.
11 -
Using a sharp knife, slice the chilled dough log into 1.27 cm (1/2 inch) thick rounds. Roll the edges of each slice in sprinkles to coat.
12 -
Arrange cookies on prepared baking sheets, spacing them about 5 cm apart. Bake for approximately 10 minutes, rotating baking sheets halfway through, until edges are set and lightly golden.
13 -
Remove cookies from the oven and allow them to cool slightly on the baking sheets before transferring to a wire rack to cool completely.