Christmas Swirled Butter Cookies

In a large bowl, blend butter and powdered sugar for 3-5 minutes until creamy.

Add egg yolks, vanilla extract, and salt; mix until combined.

Divide the butter mixture into two portions.

For white dough, stir in 1 1/4 cups all-purpose flour.

For chocolate dough, mix in 1 cup all-purpose flour and 1/4 cup cocoa powder.

Roll small portions of each dough into small balls.

Take 3 balls from each dough, alternate them in a flower shape.

Lightly press together, then gently roll into a swirl shape.

Flatten the swirls slightly and place on a parchment-lined baking sheet.

Chill for 15-30 minutes.

Preheat oven to 325°F (160°C).

Bake for 13-15 minutes until edges are golden.