Linzer Hearts

Directions

1. 1
   In a large bowl, sift together flour, baking powder, cinnamon, and salt.
2. 2
   In a food processor, pulse hazelnuts until finely ground.
3. 3
   Whisk the ground hazelnuts into the flour mixture; set aside.
4. 4
   In the bowl of an electric mixer fitted with the paddle attachment, beat butter and granulated sugar on medium-high speed until light and fluffy, 2 to 3 minutes.
5. 5
   Add the egg yolks, vanilla, and lemon zest; beat to combine, scraping down the sides of the bowl as needed.
6. 6
   With mixer on low speed, add hazelnut-flour mixture, and beat until just combined, 10 to 15 seconds.
7. 7
   Turn out the dough onto a lightly floured work surface, divide in half, and shape into flattened disks.
8. 8
   Wrap in plastic and refrigerate at least 1 hour or overnight.
9. 9
   Remove one disk of dough from the refrigerator, and let stand until softened slightly.
10. 10
    (This will help keep the dough from cracking when rolled.)
11. 11
    On a large piece of parchment paper lightly dusted with flour, roll dough to 1/8-inch thickness.
12. 12
    To prevent sticking while rolling, occasionally run a large offset spatula under dough, and add more flour to the top or bottom of dough.
13. 13
    Transfer parchment paper and dough to a baking sheet; freeze until firm, about 20 minutes.
14. 14
    Repeat with remaining dough.
15. 15
    (You can stack the parchment and dough.)
16. 16
    Preheat the oven to 325F.
17. 17
    Line two large baking sheets with parchment paper.
18. 18
    Remove one sheet of dough and parchment from freezer; working quickly, cut into heart shapes with a 3-inch cookie cutter.
19. 19
    Cut out center from half the shapes with a 2-inch cutter.
20. 20
    (If the dough begins to soften too much, return to the freezer for a few minutes.)
21. 21
    Using a wide metal spatula, transfer open hearts to prepared baking sheets, about 1 1/2 inches apart; freeze until firm, about 15 minutes.
22. 22
    (You can either bake the cutout centers for bite-size cookies, or reroll them to make the larger hearts.)
23. 23
    Bake, rotating sheets halfway through, until cookies are crisp and lightly golden all over, about 15 minutes.
24. 24
    Transfer cookies to a wire rack to cool completely.
25. 25
    (Cooled cookies can be stored overnight in an airtight container at room temperature before filling.)
26. 26
    Spread the flat sides of the whole hearts with about 1 1/2 teaspoons jam.
27. 27
    Sift confectioners sugar over the open hearts.
28. 28
    Just before serving, top open hearts with jam.
29. 29
    Cookies should be eaten the day theyre filled.
30. 30
    Heart shapes are cut from chilled linzer cookie dough, then the centers of half the hearts are cut out.
31. 31
    Once baked and cooled, the whole hearts are spread with raspberry jam, then topped with open hearts dusted with confectioners sugar.
32. 32
    The smaller heart shapes can also be baked and dusted with confectioners sugar; the baking time will be the same.