Beat butter and sugar in medium bowl with electric mixer until light and fluffy. Add almond filling, egg yolks and almond extract; beat until blended. Stir in flour, baking powder and salt with wooden spoon to make soft dough. Cover; refrigerate at least 3 hours or overnight. Preheat oven to 350'F. Shape dough into 3 cm balls. Place on ungreased baking sheets, about 4 cm apart. Press thumb into center of each ball to make indentation. Spoon half teaspoon raspberry filling into each indentation. Bake 11-13 minutes or until edges of cookies are golden brown. Cool on baking sheets 1 minute. Remove from baking sheets; cool completely on wire racks. Makes about 5 dozen cookies