The best cinnamon rolls

Ingredients (15)
310ml (1 1/4 cups) milk
2 tsp dried yeast
Pinch of caster sugar, plus extra 55g (1/4 cup)
525g (3 1/2 cups) plain flour, plus extra to dust
1 tsp salt
60g butter, melted, cooled slightly
1 egg, lightly beaten
Filling
75g butter, chopped, at room temperature
110 g (1/2 cup, firmly packed) brown sugar
3 tsp ground cinnamon
Frosting
100g cream cheese, chopped, at room temperature
20g butter, at room temperature
1 tsp vanilla extract
150g (1 cup) icing sugar mixture
2 tbsp milk, optional

My name's Don Quixote
I live on Peyote
Mushrooms Absinth & Rye
I swear by the gods
And the ever-green frogs
Tis an ill wind what blows no minds