Dissolve yeast in 1/4 cup hot but not boiling water and leave 15 minutes to swell. Meanwhile, Boil the milk with salt and white sugar. While the mixture is still warm add the beaten egg yolks and sunflower oil, yeast effervescent. The resultant mixture gradually add 3 cups flour. Izmesva when you gradually add the other 1/2 cup flour until a soft, not sticky dough. Allow to rise until it doubles its volume (about 60 minutes). After rising, the dough is rolled out to about 1 cm thick, smeared with 1/2 cup melted butter and sprinkle with 1 cup brown sugar and 1 cup cheese. Wrap roll and cut into slices. Cover with a cloth and allowed to rise for another 40 minutes. The cookies are arranged in the pan, greased with butter or sunflower oil and sprinkled with breadcrumbs. Bake in a preheated oven to 220C degrees for 15 minutes. On the remaining 1 cup brown sugar, a water bath is prepared caramel. When you are ready, the cookies are removed from the oven sprinkle with remaining 1/2 cup cheese and poured with caramel. can be served with CAFE con leche (coffee with milk). In Venezuela this is the custom. * The cookies are different, because the cheese, but gets interesting and tasty. In my family often prepare them.