Side

Mix the flour, caster sugar, yeast, milk and eggs in a mixer with the dough attachment until smooth
Add the butter and mix on medium speed
Scrape the bowl and mix again for 1 minute
Place the dough in a container, cover and refrigerate for at least 6 hours
Wrap the Brie in the prosciutto and set aside
Turn out the dough onto a lightly floured surface and roll into a 25cm circle
Place the wrapped Brie in the centre of the circle and fold the edges over neatly
Put the parcel onto a lined baking tray and brush with beaten egg
Chill the parcel in the fridge for 30 minutes
Brush the parcel again with beaten egg
Chill the parcel in the fridge for a further 30 minutes
Leave the parcel to rise at room temperature for 1 hour
Heat the oven to 400°F and bake the parcel for 22 minutes.
Serve warm