Add the butter, milk and sugar to a saucepan. Scald the milk mixture and set aside for about 40 minutes. Add the yeast. Add the eggs, vanilla, salt and flour. Blend the mixture together. Place the mixture into a greased bowl, cover with a damp towel. Let rise for about an hour. Since the dough is very tacky, I actually place it in the refrigerator for an hour so that it will be easier to roll.

Generously flour a flat surface, knead the dough, and roll the dough into a rectangle about 12×18. Spread the filling over the dough and roll the dough like a jelly roll. Pinch the seams. Place into a greased tube pan. Let it rest for about an hour and half, covered so that it may rise. Bake in a preheated 350 degrees oven for 35-40 minutes until browned. Remove from the oven and sprinkle with powdered sugar.