American
Mix the flour, sugar, yeast and salt, add 185 ml of the milk, the egg and 45 g of the butter, and knead for 8 minutes until smooth.
Cover and let the dough rise in a warm place for 60 minutes until doubled.
Roll the dough into a 30 x 40 cm rectangle, spread it with 55 g of the butter and sprinkle evenly with the brown sugar mixed with the cinnamon.
Roll up tightly from a long side, cut into 8 slices and set them cut side up in a buttered 23 cm round pan.
Cover and let rise for 30 minutes while the oven heats to 180C.
Bake for 22-25 minutes until golden and cooked through in the center.
Beat the powdered sugar with the remaining 15 g butter, melted, the remaining 25 ml milk and the vanilla, and spread the icing over the warm rolls.