A signature Christmastime sweet, our tiny almond-flavored cookies bear the print of the baker's thumb, which is gently pressed into the partially baked cookie to create a well. A dollop of apricot, red currant, or raspberry jam fills the center. If you use fruit preserves you've put up yourself, the signature is even more personal.
When reshaping the thumbprints after the cookies have baked for 10 minutes, dip your finger in ice water for several seconds and dry before reshaping; this will keep your finger cool. Or, use the bottom of a wooden spoon to make the indentations.