Sticky buns with brown sugar glaze

• 160 g unsalted butter, softened and cut into pieces, plus extra for greasing
• 90 g milk
• 2 tsp dried instant yeast
• 350 g plain flour, plus extra for dusting
• 50 g caster sugar
• 3 eggs

Cinnamon sugar

• 2 tsp ground cinnamon
• 1 tbsp caster sugar

Brown sugar glaze

• 180 g unsalted butter, softened and cut into pieces, plus extra for greasing
• 180 g light brown sugar

Assembly

• sea salt flakes, for sprinkling