Tóm tắt nội dung: Add the yeast mixture and butter to the remaining flour and miax well Knead on a floured surface for five minutes.Allow the dough to rise in a greased bowl in a warm place for 30 minutes divide the dough into 24 pie roll and form each piece into pretzel shape. Piace on a greased beaking sheet,mix the egg yolk with 1 tablesboon water and bursh the mixture.