
Preheat the oven to 350 degrees F. Remove the plastic wrap from the rolls. Mix 1 egg yolk plus milk and brush tops of rolls.
To make the cross: mix flour, milk and sugar to form a paste. Place in a pastry or ziplock bag. Snip a small hole from one corner, then squeeze the dough through the hole to form the cross on top of the cross buns. Bake in the preheated oven until golden brown, 20 to 25 minutes. Remove from oven and place onto rack to cool. Enjoy!