In a large mixing bowl, cream together unsalted butter, granulated sugar, and powdered sugar until light and fluffy. Add egg yolk, vanilla extract, almond extract, and salt, mixing until combined. Sift in the all-purpose flour gradually, stirring until a soft dough forms. Optionally fold in chocolate chips.

Wrap the prepared cookie dough tightly in plastic wrap and refrigerate for at least 1 hour to firm up.

Preheat your oven to 350°F (175°C) and line your baking sheets with parchment paper.

Roll the chilled dough into 1-inch balls, placing them on the lined baking sheets 2 inches apart. Flatten each ball gently, and sprinkle with decorative sugar if desired.

Bake in the preheated oven for 10-12 minutes until lightly golden around the edges. Cool on wire racks.

Arrange cooled cookies in a decorative box or gift tin, layered with parchment paper.