These are a specialty of the Confiserie Bachmann in Basel, one of the great pastry shops in a city that has many. The owner, Gregor Bachmann, led me through a tasting of some of his specialties, all of which were terrific. These chocolate-studded buns were my favorites.
Warm the milk in a small saucepan over low heat until it is just lukewarm. Pour it into a small bowl and whisk in the yeast. Set aside while preparing the other ingredients.
Combine the Hour, sugar, and salt in the bowl of an electric mixer. Place on the mixer fitted with the paddle attachment and mix on lowest speed for 30 seconds. Add the butter and mix until