Fluffy Cinnamon Rolls with Cinnamon-Butter Filling

Crumble the fresh yeast into a cup with the cold milk and let it stand for about a minute until it dissolves slightly.

In a large bowl, mix flour, sugar, and salt. Briefly stir the milk-yeast mixture and add it to the flour along with the egg. Knead the dough. Once it has a coarse, crumbly texture, add the cold butter in two to three portions. Knead the dough by hand or in a stand mixer for about 5 to 10 minutes until it is smooth, elastic, and no longer sticky.

For the filling, thoroughly mix the soft butter with sugar and cinnamon until a creamy, slightly frothy mixture forms. The better the butter is whipped, the easier it will be to spread later.