preheat oven to 350 degrees.

In a large bowl (or kitchen aid fitted with the paddle attachment), stir together butter, shortening, sugar, brown sugar, and vanilla extract until creamy.

Add the egg.

In a separate bowl, combine the all purpose flour, baking soda, and salt together and slowly add to the wet mixture until well blended.

Fold in the chocolate chips.

Drop by rounded tablespoon onto cookie sheet.

Bake 10-14 minutes or until golden brown.