Time Out says
Mention Ramen Muku to local foodies and you’ll see their eyes light up—it’s a truly legendary Japanese restaurant. Considering Germany’s often cold, gray weather, this place should be on your list. The noodles are homemade, as is the broth, and you can see through to the kitchen where the staff are hard at work. The menu has plenty of appetizers, a miso vegetarian ramen option and delicious matcha ice cream—plus lots of sake. Muku is in the Sachsenhausen quarter of Frankfurt, a completely non-touristy part of town. Consider a stop here after visiting the Portikus art gallery, located halfway along the Alte Brucke (old bridge).