Sift flour; measure and sift again with baking powder and salt. Set aside. Cream butter and sugar together until light and fluffy. Add egg yolks, one at a time, beating well. Blend in extracts. Gradually add flour mixture, stirring well. Form dough into 1-inch/2.5-cm balls. Put on ungreased baking sheet and press a toasted almond in center of each cookie. Bake at 300°F/150°C for 15-20 minutes, or until lightly browned. Cool 5 minutes.
Makes 4 dozen cookies.