In a pot melt the butter and then add the milk. When the temperature is a little above room temperature pour the mixture into a bowl and add the yeast.
Let the yeast activate for a few minutes.
Add the flour and sugar. The dough shouldn't be sticky. Add more flour if needed.
Let the dough rise for about 1 hour.
If you’d like to add raisins to the dough then do it after the first rising.
Roll the dough out to a rectangle about 1 cm thick.
Spread the butter on and drizzle with sugar and cinnamon.
Roll the dough into a long cylinder and cut into cinnamon rolls.
Let the rolls rise on a lined baking tray for about 40 minutes.
Brush them with an egg.
Make a tiny hole (not all the way through) in the middle of the buns and add 1 tsp of vanilla custard.
Bake in the oven for about 10-15 minutes on 225 degrees Celsius.
Recipe by Dear November at https://www.dearnovember.com/2016/03/cinnamon-rolls-with-vanilla-custard/