Dissolve yeast in warm water. Sift 3 cups of the flour into a large mixing bowl, make a deep well and pour in the yeast, milk, sugar, salt, eggs and butter. Mix until combined. (This can be done using a strong stand mixer such as a Kitchenaid with the dough hook) Mix in enough of the reserved flour to make a soft dough. This is then kneaded on a lightly floured board or using the dough hook of your mixer until soft and elastic. Coat the dough with a little melted butter and return to the bowl to rise, covered until doubled in volume. Punch down, and allow to rise back to its original size again.