Preheat oven to 350°F. Mix 2 teaspoons baking soda with 2 teaspoons water and set aside. Cream together shortening, granulated sugar and brown sugar. Add vanilla, eggs and baking soda/water mix. Gradually beat in flour and salt. Mix in chocolate chips. Spread out in a greased jelly roll pan. Bake at 350°F for 20-25 minutes until golden brown. Allow them to cool completely before cutting into bars.
Recipe adapted from Nestle.