This is a heavenly cookie that I remember helping my mother make as a little child. I don't know if the angel in the name refers to Christmastime, when we always made them, or the children whose perfect little thumbs were just the right size for this recipe. As an adult, I appreciate the light, buttery dough and how it contrasts so beautifully with the sweet-tart of the apricot preserves. It is different enough from other thumbprint recipes, that I decided to post it.