Butterfinger, Baby Ruth, TWIX®, or your favorite.
Mix shortening, sugar, brown sugar, eggs, and vanilla together well. In a separate bowl sift together flour, soda, and salt. Add sifted dry ingredients to shortening mixture; mix well.
Crumble the 3 candy bars. Add crumbled candy bars to other ingredients. Mix until blended. Roll cookie dough into small balls the size of walnuts.