01 -
In a large mixing bowl, use an electric hand mixer or stand mixer fitted with the paddle attachment to beat together the unsalted butter and granulated sugar until light and fluffy, approximately 3 minutes.
02 -
Blend in the vanilla extract, almond extract, and kosher salt, mixing until fully combined.
03 -
Beat in the large egg until the dough is homogenous.
04 -
Gradually add all-purpose flour and baking powder, incorporating about 1/2 cup at a time. Mix just until integrated, avoiding overmixing.
05 -
Form the dough into a ball and divide in half. Roll out each half onto sheets of parchment paper to a thickness of 1/4 inch.
06 -
Transfer the rolled dough on parchment onto baking sheets and cover with plastic wrap. Refrigerate for at least 2 hours or overnight for optimal texture.
07 -
Preheat the oven to 350°F (177°C). Line two large baking sheets with parchment paper or silicone baking mats.
08 -
Choose two cookie cutters of the same shape in different sizes, with the largest being approximately 2 to 3 inches. Prepare to cut cookie outlines and centers for stained glass effect.