Melt Chocolate and Butter

Over medium heat melt 1 1/2 cups of chocolate chips with butter in a double boiler stirring with a spatula until smooth. Remove from heat and set aside.

Prepare Ribbon Stage

In a large bowl or a stand mixer beat granulated and brown sugars, eggs, baking powder, and salt for about 4 minutes. Then add vanilla extract and continue beating for 1 more minute.

Prepare Cookie Dough

Add melted chocolate to the Ribbon Stage and beat until combined. Then add flour and cocoa powder beating until well combined.

Make The Brownie Cookie Trio

This step explains how to make the brownie cookie trio which includes double chocolate chip brownie cookies, walnut brownie cookies and pecan brownie cookies. Divide cookie dough evenly into thirds using a kitchen scale. Add walnuts into one third of the cookie dough and stir until combined. Add pecans to another third of the cookie dough and stir until combined. Then add the remainder chocolate chips to the final third cookie dough and stir until combined.

Chill Dough

Wrap cookie dough in a piece of plastic wrap about 12-inches long and roll evenly into a log. Wrap each cookie dough separately. Place plastic wrapped cookie dough logs in refrigerator for about 30 minutes or until firm. Optional: In the meantime, take about 2 Tablespoons of finely chopped nuts and set aside on a cutting board.

Cut Cookies

Preheat oven to 350 degrees Fahrenheit. Working with one log at a time. Remove cookie dough log from refrigerator. Unwrap plastic and cut log into 1/2-inch pieces. To get uniformed round cookies roll each piece of dough into a ball. If desired, roll top of ball in finely chopped nuts. Place ball on baking pan lined with parchment paper and gently press down.

Bake

Bake for 10-12 minutes in preheated oven. Carefully remove baking pan from oven. Using a metal spatula transfer cookies to a cooling rack to cool completely.