Baking hobbyists like to get their kicks at the King Arthur Baking Company. If you’ve seen their mail-order catalog, you know it peddles baking porn at its most seductive. Just looking at those specialty flours, secret ingredients, shiny pans and professional gadgets makes my heart go pit-a-pat. And then there are the online recipes. More than 500 breads plus tons of cakes, cookies and pastries—everything from serious sourdoughs to fake Twinkies. King Arthur used this recipe for many years as a kind of gateway drug to bread baking. Milk-enriched, it has the soft, pillowy texture you’ll find in the trendy Japanese milk bread, but without all the fuss. Two balls of dough for each…