• Combine 1 ½ cups all-purpose flour and ¼ teaspoon kosher salt in a food processor, and pulse several times.
• Cut 12 Tablespoons cold unsalted butter into 15 pieces and add them to the bowl of the food processor; pulse about 20 times. The mixture will become a fine powder. Check the consistency to avoid over-working the dough.
• To the food processor, add ½ cup sour cream; pulse an additional 5 or 6 times. The dough will form a ball. Remove from the food processor and press into a 6-inch square. Wrap in plastic and refrigerate for about 1 hour.

How to make the filling

• Divide the dough into thirds and shape into circles. roll each out to about 10-inch squares.
• For the filling, place the raisins into a saucepan and cover with water. Bring to a boil over low heat. Drain and cool. In a separate bowl, combine the turbinado sugar, finely chopped walnuts, and cinnamon
• Set a rack in the middle level of the oven and preheat oven to 350 degrees.
• Remove one circle of dough at a time, Place on your work surface, Place 1 tablespoon of the jam onto the dough, then scatter one-third of the raisins and one-third of the filling mixture onto the dough. With a pastry wheel, cut the dough into 12 wedges and roll each one up from the edge to the point.
• Arrange pastries on a parchment paper lined baking pan.
• Bake the pastry for about 30 minutes. Check them often as the sugar can leak and cause the bottom of pastry to burn. Lower temperature about 25 degrees if the bottom of pastry begins to burn.
• When pastries are done, cool briefly, then move the cookies to a cooling rack to cool completely.
• Sprinkle the confectioner's sugar onto the pastries. Store the cookies in a covered container.