7.The next day, preheat the oven to 375 F. Roll the dough in flour with mixed powdered sugar.
8.Make 3-inch squares.
9.Put 1/2 tsp filling in the center of the square. Fold up 2 opposite corners.
10.Brush with the remaining egg white.
11.Roll in powdered sugar.
12.Bake on a parchment paper-lined cookie sheet for 12-15 minutes. Check after 12 minutes – don’t overcook. After the cookies are cooled, roll in powdered sugar again.
