Rogaliki (Rugelach)

Directions

1. 1
   In a mixing bowl, sift 2 cups flour and mix with active dry yeast. Cut cold butter into small pieces and add to the flour. You can use a fork or your hands to mix butter with the flour and yeast until it is crumbly.
2. 2
   In a separate bowl, mix sour cream, sugar, egg yolks and vanilla. Add to the dry ingredients, and mix it again. Add remaining 1/2 cup flour and knead the dough until it is smooth and doesn't stick to your hands.
3. 3
   Divide dough into 6 even pieces and wrap in plastic wrap. Refrigerate for 1 hour.
4. 4
   When the dough is ready, take one ball and roll it to about 2-3 mm thick. Using a pizza cutter, cut it into 12 equal pieces. Put a little bit of jam on the wider edges of each triangle and roll it in.
5. 5
   Preheat oven to 350°F and bake for 15-20 minutes, until they have a beautiful gold color. Let cool and dust with powdered sugar before serving.