Instructions

1. 1
   Stir the yeast smooth in a little lukewarm milk. Put the flour in a bowl, make a well, and stir the yeast mixture into a small pre-dough in the center (about the thickness of a thick pancake batter).
2. 2
   Cover and let the pre-dough rise in a warm place.
3. 3
   Add the lukewarm melted butter and the remaining ingredients to the pre-dough. Knead vigorously, adding enough lukewarm milk until the dough is smooth, supple, and pulls away from the bowl - knead until it forms bubbles.
4. 4
   Let rise again in a warm place until doubled in size.
5. 5
   Roll out the dough and place on a well-greased baking sheet.
6. 6
   For Zimtkuchen: spread the dough about 2 cm thick in a greased pan and let rise another 15 minutes. Just before baking, brush with melted butter, sprinkle with sugar and cinnamon, and bake at moderate heat (170-180 degrees C / 340-355 degrees F) for 30 minutes.