FOR THE DOUGH
120g whole milk
270g eggs ( about 4 large eggs and half)
600g ( 4 3/4 cups ) all-purpose/plain flour, plus more for flouring
2 1/2 teaspoons ( 7.5g) instant dry yeast
50g granulated/caster sugar
1 teaspoon ( 5g ) sea salt
230g ( 16 tablespoons ) unsalted butter, softened, cut into pieces, plus more for greasing Neutral/vegetable oil, for coating

FOR THE FILLING
300g light brown sugar
2 tablespoons/15g ground cinnamon
200g (about 14 tablespoons )unsalted butter, softened

FOR THE FROSTING
90g unsalted butter, softened
200g full-fat cream cheese
1/2 tsp vanilla bean paste/ extract
60g powdered/icing sugar