Sift the flour,
baking powder, cinnamon, and salt into a medium
bowl.
Beat the butter and granulated and brown
sugars in a large bowl with an electric mixer at
high speed until creamy. Add the egg, vanilla, and
lemon zest, beating until just blended.
Mix in the
dry ingredients to form a smooth dough. Press the
dough into a disk, wrap in plastic wrap, and
refrigerate for 30 minutes.
Preheat the oven to
350°F/180°C/ gas 4. Butter two cookie sheets. Roll out
one third of the dough on a lightly floured
surface to a thickness of 1/4 inch (5 mm).
Use a
3 1/2-inch (9cm) heart-shaped cookie cutter to cut
out the cookies. Gather the dough scraps, re-roll,
and continue cutting out cookies until all the dough
is used.
Use a spatula to transfer the cookies to
the prepared cookie sheets, placing them 1/2 inch (1
cm) apart. Bake for 8-10 minutes, or until just
golden. Transfer to racks to cool.
Cranberry
Topping: Process the cranberries, granulated sugar,
and preserves in a food processor or blender until
pureed.
Transfer to a saucepan and cook over
medium heat for 8 minutes, or until reduced to 1 cup
(250 ml). Remove from the heat and let cool for 15
minutes.
Use a thin metal spatula to spread the
topping over the tops of the cookies. Dust with the
confectioners' sugar just before serving.