Marbled chocolate cookies (Print Version)

# Ingredients:

01 - 1/2 cup softened unsalted butter.
02 - 1 large egg.
03 - 1/2 cup packed brown sugar.
04 - 1/4 teaspoon salt.
05 - 1/2 teaspoon baking soda.
06 - 1/2 cup cocoa powder.
07 - 1 teaspoon vanilla extract.
08 - 1 1/2 cups all-purpose flour.
09 - 1/2 cup creamy peanut butter.
10 - 1/2 cup granulated sugar.

# Instructions:

01 - Set your oven to 350°F and line a baking sheet with parchment paper.
02 - Whip the butter with both sugars. Then stir in the egg and vanilla.
03 - Stir together the flour, salt, and baking soda. Slowly add this to the wet mix.
04 - Separate the dough in half. Mix cocoa into one portion and peanut butter into the other.
05 - Roll swirled balls combining both doughs, then bake for 10-12 minutes.

# Notes:

01 - The centers should still look slightly soft right out of the oven.
02 - Let them cool completely on the tray before moving them.