Preheat the oven to 325 degrees.
Put 2/3 cup of chocolate chips in a double boiler. Melt the chocolate and then set aside.
In a large bowl combine the flour, cocoa, baking soda and salt. In a mixer combine the butter, brown sugar and white sugar until smooth. Slowly add the melted chocolate until fully combined. Next add the egg and vanilla. Once combined, slowly add the flour mixture until it is combined. Finally add the remaining chocolate chips.
Line 2 baking sheets with parchment paper. Scoop 1/4 cup worth of dough and place onto the baking sheet. (about 6 cookies per sheet) Bake the cookies for 16-18 minutes and remove. Let cool on a cooling rack and then devour!!!!