Jam Thumbprints

01Method

1. 1

   Heat the oven to 350°F (175°C). Prepare cookie sheets by greasing lightly or lining with parchment paper.

2. 2

   In a large bowl, beat the butter and sugar together until pale and fluffy. Mix in the egg yolks, vanilla, and salt, then incorporate the flour gradually until a dough forms.

3. 3

   Roll the dough into balls about ¾ inch in diameter. Coat each ball in egg white, then press into the chopped walnuts to cover. Arrange on the prepared sheets about 1 inch apart and use your thumb to make an indent in the center of each.

4. 4

   Bake for 15 to 17 minutes until golden. Let the cookies rest on the sheet for 5 minutes before transferring to a wire rack to cool fully. Fill each indent with strawberry preserves just before serving.