Roll between 2 pieces of plastic wrap and refrigerate for 30 minutes. In the meantime, preheat your oven to 180 degrees C. To cut these cookies, we need to score the dough in a pixel pattern. To do so, using a carving knife or any long blade, score the dough with vertical lines, about 1/4″ apart. Then score the dough with horizontal lines. Using a pairing knife and following the lines on the dough, cut out your Tetris pieces and place them on baking sheets.