One of the best clusters of no-frills finds in Cambridge is in the Porter Exchange Building's Japanese-themed mini-mall, which has its own Tokyo-style food court. The highlight here is Sapporo Ramen. We were sent there for the monster bowls of miso-butter ramen. Japanese servings of ramen-noodle soups are typically enormous; students often eat one as their daily meal in Japan. Sapporo's ramen is available with several different broths and with your choice of various Chinese vegetables and/or thick slices of succulent roast pork. These last ingredients add extra dimension to the mild, savory miso broth, which is further enriched with a big pat of butter. As the butter melts, it coats your palate and the noodles. On a cold day in Cambridge, and there are more than a few of them, there's no place you'd rather be, despite the bright lighting and the Tokyo-subway tightness of the seating. Upstairs, there is more to find, including the Japonaise Bakery, which produces some of the most perfect croissants and scones in New England as well as a red-bean-paste-filled doughnut that is like a Japanese version of a Krispy Kreme.