Traditionally, butter, lard, (and cream cheese) is kept VERY COLD, and cut in pea size pieces when mixing with flour. It is time-intensive, but worth it.
Pork Livers in Northern VA
Chef, you can get pork livers in Northern VA at Lotte markets in the premium meat cases (butcher case). There's one in Chantilly --I just bought it tonight to cook with Porketta.