Line 3 baking sheets with parchment paper. Set aside.
In a medium bowl, stir together flour, baking powder and salt. Set aside.
In a large bowl, beat butter, white sugar and brown sugar together on high speed until light and fluffy (about 2 minutes).
Beat in egg and vanilla until well mixed.
Pour dry ingredients into the wet ingredients and beat just until well mixed.
Drop rounded cookies (1.5 tablespoon in size), 2 inches apart, onto parchment paper lined baking sheets.
Using the back of a teaspoon (dusted in flour to prevent sticking), press back of teaspoon about half way down into each cookie to create an indent for the jam.
Using a small spoon, fill each indent with jam of your choice (raspberry and peach shown here in photos).
Bake for 13-15 minutes or until bottom edges look slightly browned.
Remove from oven and let cool for 10 minutes before removing and placing on wire racks to cool completely.
Video
[adthrive-in-post-video-player video-id="OmB9Vjvy" upload-date="2021-09-03T00:00:00.000Z" name="Thumbprint Cookies" description="Thumbprint Cookies are a traditional Christmas cookie made from a soft sugar cookie recipe and filled with jam. Perfect for your holiday cookie exchange or to bake with the kids!"]
Notes
Store leftovers at room temperature in a sealed food storage container for up to one week for maximum freshness.