These thumbprint cookies feature a buttery shortbread base with a tangy huckleberry jam center, delivering a nostalgic and satisfying treat perfect for any occasion.
Use European-style butter for best richness. Chilling dough overnight yields best texture and shape. Mix cornstarch into jam to prevent spreading. Press thumbprints gently to avoid cracking. Watch baking time closely to avoid overbaking. Cool completely before storing to prevent jam from sticking.
Keywords: huckleberry jam, thumbprint cookies, shortbread, homemade cookies, easy cookies, berry jam cookies, buttery cookies