In a large bowl, cream together the butter and confectioners' sugar until light and fluffy. Beat in the vanilla and salt.
Gradually stir in the flour and mix until a soft dough forms. Stir in the pecans.
Roll the dough into 1 inch balls and place onto ungreased baking sheets. Make an indentation into each cookie with your thumb. Fill each indentation with raspberry jam.
Bake for 8 to 10 minutes in the preheated oven, or until cookies are golden brown.
Remove from baking sheets to cool on wire racks. Store in an airtight container.
Interesting Facts
This recipe originated in Scotland in the 1800s.
These cookies are also known as "Thumbprint Cookies" or "Butter Truffles".
These cookies can be made in any flavor of jam or jelly.