This is my mom’s secret chocolate chip cookie recipe, handed down from generation to generation, from back of bag to recipe card.  Yep, I found out that this recipe is the same as the back of the Nestle Toll House Semi-Sweet Chocolate Chips bag.  I think she doubled it, probably so it will go further, last longer.  You can probably reduce the amount of sugar (my notes on the card suggest 1 cup and not 1.5 cups) and not notice much difference.  I have also tried half butter, half shortening and it turned out awesome. My suggestion is to stick with the semi-sweet chips.