In a medium size bowl, mix the softened butter and sugars together until creamed.
Mix in the egg and vanilla.
In that bowl, mix the flour, cocoa powder, baking soda, and salt.
Fold in 1/4 cup chocolate chips. You will notice this is a soft dough
Place the dough in the center of the baking sheet and mold into a tall ball 3 inches wide.
Dot the top of the cookie with some chocolate chips too if you wish
Bake for 15-16 minutes. don’t go over 16 minutes. The cookie will appear very soft, but will firm up as it cools. Allow to cool completely on baking sheet.
Recipe Notes
*To get 1 Tbsp egg, crack egg into a small bowl, whisk until yolk and white are well blended, then measure out 1 Tbsp. *If you don’t have brown sugar you can use white