Preheat oven to 300 degrees. Cream butter and sugar together until light and fluffy. Sift together flour and baking powder. Add 2 egg yolks and the extracts. Blend in dry ingredients. Roll dough into 1 inch balls and place on an ungreased cookie sheet. Press an almond into each ball and flatten slightly. Make an egg wash using egg yolk, and water, brush this over each cookie. Bake cooking for 15-18 minutes or until golden brown.