01 -
Blend butter and powdered sugar for 3-5 minutes until creamy. Mix in egg yolks, vanilla extract, and salt until combined.
02 -
Split mixture in half. For white dough, add 1 1/4 cup flour. For chocolate dough, mix in 1 cup flour and cocoa powder.
03 -
Roll 1/4 teaspoon portions of each dough into small balls.
04 -
Arrange 3 balls of each dough alternately in a flower pattern. Press together and roll into a swirl shape.
05 -
Flatten swirls slightly, place on lined baking sheet. Chill 15-30 minutes. Bake at 325°F for 13-15 minutes until edges are golden.