Line a 9 x 13 inch pan with foil bringing up the edges. Put in 1 layer of saltine crackers. Boil 1 cup of brown sugar and 2 cups of butter for 3 minutes stirring but don't let it get brown. Pour this mixture over the crackers and bake for 15 minutes at 350 degrees. Take out of the oven and put 1 package of chocolate chips on top. Freeze and then break into pieces.