Marble chocolate chunky cookies

Preheat oven to 350F (190°C).

Cream together unsalted butter and powdered sugar until smooth. Beat in the egg.

In a separate bowl, whisk together the all-purpose flour, baking soda, and salt. Gradually add the flour mixture to the butter mixture and mix until just combined.

Split the plain dough into two portions. Sift cacao powder into one half and mix until combined, creating chocolate dough.

Take small portions of each dough (plain and chocolate), flatten them, lay them on top of each other several times, and then form them into marbled circles.

Bake the cookies in the preheated oven at 350F (190°C) for 15 minutes or until the edges are golden brown.