Cinnamon apple Chelsea buns

Ingredients

• For the buns:
• 250 ml whole milk
• 50 g unsalted butter
• 75 g caster sugar
• 2 medium eggs
• 550 g strong bread flour
• 7 g instant action yeast
• Finely grated zest 1 lemon
• 1 tsp salt
• For the filling:
• 100 g unsalted butter
• 5 eating apples, skin on, scored and cut into 1 cm chunks
• 100 g light brown sugar
• 1 tbsp ground cinnamon, plus extra, for dusting (optional)
• 2 tsp vanilla bean paste
• For the icing:
• 60 g unsalted butter, softened
• 165 g cream cheese (ideally Philadelphia), at room temperature 100 g icing sugar, sifted
• 1 tsp vanilla bean paste
• You will need:
• 20–23 cm square baking tin,lined with baking paper