Line a jelly roll pan with fork. Place saltines as close together as possible. Bring to boil 2 sticks of real butter (no substitutes) and 1 cup light brown sugar. Cook 3 minutes stirring. Drizzle over crackers. Bake at 400 degrees for 5 minutes.
Remove and sprinkle with 10 oz. milk chocolate or butterscotch morsels (do not use semi-sweet chocolate). Sprinkle with chopped nuts. Let stand 5 minutes. Gently spread with knife or back of spoon to cover crackers. Refrigerate. Remove foil and break into pieces. (I use 5 oz. chocolate and 5 oz. butterscotch.)