01 -
Cream together the butter and sugar until light and fluffy. Add eggs and vanilla extract, mixing thoroughly.
02 -
Split the dough into two equal portions. Leave one portion plain and mix the cocoa powder into the other to create chocolate and vanilla layers.
03 -
Layer small portions of vanilla and chocolate dough alternately in your baking pan. Use a toothpick or skewer to create swirled patterns.
04 -
Refrigerate the layered dough for at least 30 minutes to prevent spreading during baking.
05 -
Preheat the oven to 350°F (175°C). Bake the cookies for 10-12 minutes. Allow them to cool on the baking sheet for 5 minutes before transferring to a wire rack.
06 -
Store cookies in an airtight container for up to 5 days. Place a piece of bread in the container to maintain softness.