Michael Ruhlman, food writer, author, and vocal advocate for real food and home cooking, discusses his newest treatise, The Book of Schmaltz: A Love Song to a Forgotten Fat. He explains what schmaltz is, how to render it, and how to cook with it. And most surprisingly, schmaltz can be substituted for butter in baked goods. Think a chicken pot pie nestled in a schmaltz crust. Oy. Leave us a message: https://leit.es/chat. Follow @amytraverso and @davidleite.