Cream together the butter, shortening, vanilla and brown sugar.
Add the eggs one at a time and mix in.
Add the flour, baking soda, baking powder and salt. Mix until combined.
Add the chocolate chips. Mix in.
Scoop the cookies out using a medium scoop onto a greased baking sheet. Bake for about 13 minutes until a light golden brown. These are best slightly underbaked. Leave them on the cookie sheets for 2 minutes and then remove to a rack to cool.
Recipe by Recipes Food and Cooking at https://recipesfoodandcooking.com/2015/09/21/chocolate-chip-cookies/