Gringalet, first of all, thanks for the tip. When in Munich, I was desperate to find your Grannies Milkshop. I first looked in the wrong Wilhelmstrasse. Then I found out the Wilhelmstrasse you are referring to, is called Herzog Wilhelmstrasse. It's very confusing, but theare actually is a shop Oma's Köstlichkeiten at the Sendlinger Tor, but they don't sell food. You probably mean Ida's Milchladen in nearby Kreutzstrasse. Ida was on holiday when my quest ended there, but it is a cateringshop. Must be the one. Sincerely yours, Sherlock Holmes.