In a large bowl, with an electric mixer, cream the butter and sugar until fluffy. Add the eggs 1 at a time, the vanilla and almond extracts and blend well. In separate bowl, combine the flour, baking powder, salt and ground almonds. Add flour mixture to sugar mixture and blend well. Fold in the slivered almonds. Roll out dough onto a flour dusted work surface and cut into desired shapes. Place cookies onto parchment lined cookie sheet and bake for 8 to 10 minutes. Transfer to a wire rack to cool.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.