1

In large bowl, beat butter at medium speed until creamy; gradually add powdered sugar, beating until blended. Add 2 eggs and 1 egg yolk, beating until combined.

2

In separate bowl, combine flour and baking powder. Add to butter mixture, beating at a low speed until blended. Shape dough into a ball, and wrap in plastic wrap. Chill for about an hour, until firm.

3

Preheat oven to 350 degrees F. Prepare cookie sheets with lightly greased parchment paper.

4

Roll dough to 1/8" thickness on a lightly floured surface; cut with a 3" round cutter. Place on prepared cookie sheets; brush with lightly beaten egg white.

5

Stir together sugar and cinnamon, and sprinkle evenly over cookies. Gently press 5 almond slices in a spoke design around the center of each cookie.

6

Bake 4 minutes; remove pan from oven, and gently press almonds into cookies again. Bake 4 minutes more, or until edges are lightly browned. Remove cookies to wire racks to cool.