Mix rest of milk with the butter and heat it to lukewarm. Add the yeast and mix well again. Cover the dough, keep in a warm place, and let rest for 15 min. Allow to rise for 15-20 min. Split and serve with butter.
Warm water Sift the flours and salty into a warm bowl.
Cream the yeast with the sugar. Add the warmed milk and water, then the oil. Stir into the flour to make a batter, and beat vigorously until smooth and elastic. Break it down by beating with a wooden spoon. Cover and leave in a warm place to prove for another 30 minutes.