Directions

• In a large bowl, cut butter into flour until mixture resembles coarse
• crumbs. Combine sour cream and egg yolk; add to flour mixture,
• stirring with a fork to form a soft dough. Divide in half; wrap in
• plastic wrap. Refrigerate several hours or overnight.
• On a floured surface, roll each portion of dough into a 12-in.
• square. Spread with preserves. Combine crushed wafers and coconut;
• sprinkle over preserves.
• Roll up jelly-roll style; seal seam. Place seam side down on a
• greased baking sheet. Cut widthwise with a sharp knife three-fourths
• of the way through dough every 1 in. Beat egg white until foamy;