Instructions
Combine the flour, sugar, baking powder and salt in a large bowl (or electric mixer bowl). Blend the ingredients thoroughly. Add the butter and work it into the dry ingredients. In another bowl, combine the sour cream, egg yolks and milk and blend thoroughly. Add the liquids to the dry ingredients and beat the ingredients until a smooth, uniform dough has formed. Cut the dough into 6 pieces and wrap each piece separately. Refrigerate over night of for at least . Preheat the oven to 375 degrees. Roll each piece, one at a time into a thin circle. Sprinkle each circle with some sugar (about 1/4 cup for each of the 6 circles). Sprinkle with cinnamon to taste. Sprinkle with equal amounts of the nuts. Roll the circles tightly, jellyroll style and place them seam side down on a lightly greased cookie sheet. Brush the outside of each roll with some of the beaten egg whites. Bake for or until golden brown. Let cool and cut into slices. Makes 6 rolls