Soften the yeast in the warm water in a large bowl.
Mixing until smooth, blend in the scalded lukewarm milk, sugar, salt, egg yolks, butter, and half of the flour. Mix in enough of the remaining flour to make a soft dough. Turn onto a lightly floured surface.
Knead until smooth and elastic, using additional flour if necessary. Put into a greased deep bowl; turn dough to bring greased surface to top. Cover; let rise in a warm place until doubled, about 1 hour.
Punch down; roll out dough into a rectangle 1/4 inch thick. Beat egg whites until stiff, not dry, peaks are formed. Spread HALF OF THE EGG WHITES on dough surface (reserve remaining half for topping). Sprinkle with a mixture of the raisins, 1/2 cup of the almonds, and the pineapple. Cut into 2 1/2 inch squares, then cut each square diagonally in half. Bring triangle corners to center; pinch to seal and place on greased baking sheets.
Top with a mixture of the reserved egg white and almonds, Cover; let rise again until very light, about 45 minutes.
Bake at 375°F 10 minutes or until lightly browned. About 4 dozen Kipfel.
TEA CREASCENTS: Follow recipe for Tea Kipfel. Divide dough into thirds. Roll out each piece into an 8 - inch round. Spread with a portion of the beaten egg white and filling mixture. Cut round into 12 wedges. Starting at wider edge, roll up and place with pointed edge down, 2 inches apart, on a greased baking sheet. Top and bake as directed. If desired, spread with a confectioners’ sugar glaze. About 3 dozen Crescents.