Preheat oven to 325 degrees.
In a food processor, combine flour, 1/2 cup confectioners' sugar and salt. Process until blended.
Add butter, and process with on/off turns until mixture is like coarse meal. Then process until dough pulls away from bowl and forms a ball.
Wrap in plastic wrap and refrigerate for 1 hour.
On a well floured surface roll dough to 1/8 inch thick.
Cut dough into heart shapes with 3-4 inch cookie cutter.
Using a 1-2" heart shaped cookie cutter, cut out centers of half of the cookies.
Place cookies on a baking sheet. Bake at 325 degrees for 13-16 minutes until lightly browned.
Remove from baking sheet and cool on racks.
Spread each solid cookie with raspberry jam.
Sift confectioner's sugar over cookies with heart cut out and place on top of jam covered cookies.