Preheat oven to 350 degrees. Line a 15×10 inch jelly roll pan (cookie sheet) with foil or parchment paper; grease the foil. Line the pan with saltines, placed as close together as possible. Combine sugar and butter in a small saucepan and bring to a boil, stirring often. Boil for 2 1/2 minutes, stirring constantly. Pour butter sauce over crackers. Place coated saltine in preheated oven for 5 minutes. Remove from oven and sprinkle chocolate chips on top. When the chips are melted, spread chocolate over cookies and sprinkle with nuts. Cool and cut or break into small squares. Makes 3 dozen cookies.