Preheat oven to 350F degrees. Gather your ingredients so that you have everything close at hand on the counter or table. Line baking sheets with parchment paper or silicone baking mats.
In a small bowl, combine all-purpose flour, baking cocoa, baking soda, and salt. Set aside.
In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar. Mix in large eggs and vanilla extract.
Gradually beat in flour mixture. Stir in peanut butter chips and chocolate chips.
Drop by rounded tablespoonfuls onto prepared baking sheets, three to a row, for a total of 12 cookies on each sheet.
Bake in preheated oven for 10-12 minutes until centers are set. Remove from oven and allow to set for 5 minutes before transferring to wire racks. Makes 3-4 dozen.
Notes
*Unless otherwise indicated, all butter used on this recipe site is salted.