Melt the butter.
Fit the Whisk Tool to the machine.
Add Ingredients 1 (milk, butter, egg) into the Mixer bowl.
Attach the Mixer bowl to the machine and fit the splash guard.
Whisk on speed Min until combined.
Retrieve, clean the Mixer bowl and fit the Spiral Dough Tool.
Add Ingredients 2 (flour, yeast, sugar, salt) into the Mixer bowl.
Knead on speed 4 for about 8 minutes.
Cover the Mixer bowl with a damp cloth.
Leave to rise in a warm place for 1 hour until doubled in size.
Transfer dough to a lightly floured worksurface and form into 12 buns.
Transfer buns onto a lightly floured baking tray.
Leave to rise for 20 minutes.
Preheat an oven to 190ºC.
Brush buns with Ingredients 3 (egg).
Bake for 20 minutes at 190ºC until golden and springy.
Leave to cool.
Serve.