Put 100 ml water, 5 tbsp sugar and 20 g fresh yeast in a pot, heat on low and dissolve the sugar and yeast while stirring.
Put 200 g all-purpose flour, 200 ml milk and the warm yeast mixture in a large bowl, stir gently and let rest for 5 minutes.
Add 500 g all-purpose flour as well as 2 eggs, 1 pinch salt and 80 ml neutral oil and knead for about 5 minutes into a smooth, even dough see tips and tricks.
Cover the bowl with a towel and let rise for 2 hours in a warm place (approx. 37 °C (99 °F)).
Shortly before the rising time is up, melt 150 g butter in a pot over low heat.
Add 200 g brown sugar and 1 tbsp cinnamon, stir and set aside.
Grease a deep baking sheet or a baking dish (exactly 16 rolls should fit in it) with 1 tbsp butter.
Knead the yeast dough vigorously once more and roll it out on a floured work surface or a large silicone baking mat to about 40 x 50 cm.
Spread the prepared cinnamon filling evenly over the rolled-out dough.
Then roll up the dough starting from the long side and cut into slices about 3 cm thick.
Place the rolls cut side down on the baking sheet or in the baking dish with a little space between them.
Cover the baking sheet or baking dish with the cinnamon rolls with a towel and let rise for another 20 minutes in a warm place.
Meanwhile, preheat the oven to 180 °C (350 °F) convection/fan.
In the meantime, melt 90 g butter and stir in 1 tsp cinnamon and 1 tsp brown sugar. Pour the butter cinnamon mixture over the cinnamon rolls.
Then put the prepared cinnamon rolls in the oven and bake for about 15 - 20 minutes until golden brown, take them out of the oven and let them cool in the pan for about 10 - 15 minutes.
Stir 100 g powdered sugar and 1 tbsp water into a sugar glaze and spread it over the cinnamon rolls see tips and tricks.
Best enjoyed while still warm see tips and tricks.