Pineapple buns

Dough

• oil, for greasing
• 140 g milk
• 20 g caster sugar
• 1 tsp dried instant yeast
• 270 g baker's flour, plus extra for dusting
• 30 g plain flour
• 1 egg
• ¼ tsp salt
• 30 g unsalted butter, softened

Topping

• 60 g unsalted butter, softened
• 60 g caster sugar
• 1 tsp milk powder
• 120 g baker's flour
• ½ egg, lightly beaten
• baker's flour, for dusting

Assembly

• ½ egg, lightly beaten