While the ramen is cooking, make the miso sauce. Melt the butter in a medium sauté pan over low heat. Add the miso, chili ...

Photograph by David Guttenfelder, Nat Geo Image Collection Chefs use red pepper and Sichuan peppercorns for a numbing spice when preparing the famous spicy ramen served at Kikanbo Miso Ramen in Tokyo.