Reserve cake mix small packet
Beat eggs with baking soda in bowl.
Add shortening.
Blend in dry cake mix and flour; mix well.
Divide dough in half; blend contents of small packet into
half of dough.
On waxed  paper, shape each half of dough into long strip
1/2  inch thick and 1 1/2 inches wide.  Press strips together lightly.
Cut to make 3 short strips.  Wrap in waxed paper and store in
refrigerator.
Preheat oven to 350 degrees
Slice dough 1/4 inch thick and put into ungreased cookie sheets.
Bake for 10 minutes
Makes 6 dozen cookies