Preheat oven to 350ºF (175ºC). Combine the flour, sugar, baking
powder, baking soda, and salt in the bowl of a food processor. Pulse
briefly to blend. Add the whole egg and egg white and pulse until
incorporated.
Add the orange zest and almonds and pulse until the mixture forms a
ball.
Transfer the dough to a greased cookie sheet and form into a 12 x
3-inch loaf. Bake for 25 minutes. Transfer the loaf to a cooling rack.
When cool, slice the loaf into 12 1-inch thick cookies. Return the
cookies to the cookie sheet and bake for an additional 20 minutes.
Transfer the cookies to the cooling rack and allow to cool.
