I recently saw a cooking show , (The Barefoot Contessa, Ina Garten) chilled the butter really hard, and used a cheese grater, the boxy type, and voila! The butter just had to be stirred into the flour at that point no labour involved. My mom used 2 butter knives and I have a cutter used for the purpose, but I'm going to try Ina's method next as I'm not that patient ... View related article.