Pre-heat oven to 375 degrees
In a large mixing bowl add butter, crisco, brown sugar, sugar, eggs, and vanilla. Use a hand mixer to cream together. Once creamed together, add flour, baking soda, and salt; mix well with a wooden spoon. Once everything is mixed well and it looks like cookie dough, add both bags of chocolate chips, mix well. Chill dough in the fridge for about 20 minutes. For monster cookies, drop by ice cream scoops full. Depending on the size of your cookie sheets, you may only be able to make 2-4 cookies at a time. For normal sized cookies drop by tablespoons full.
Monster cookies bake at 375 degrees for 14-16 minutes or until edges are brown and center is cooked.
* I always make the monster cookies, but for normal sized cookies bake at 375 degrees but reduce the cooking time. I would try 8 minutes. =)