Create the butter block: Next, create your butter block. To transform sticks of cool butter into a giant block of butter, pound them together with a rolling pin — pound it flat, then scrape it up with a pastry scraper, then pound it flat again. Continue until you can fold the butter over on itself, but it doesn't crack. Sprinkle your rolling pin with a little flour to keep it from sticking as you pound. Once pliable, shape the butter into a flat square, wrap it in plastic, and chill for 10 minutes — no longer or you'll lose the pliability.