Speculaas: In a separate bowl, whisk together the flour, almond flour, baking powder, spices, and salt.  Set aside.

In the bowl of your electric mixer (or with a hand mixer), cream the butter and sugar until light and fluffy.  Beat in the egg and lemon zest until well combined.  Add the flour mixture and beat until combined.  Flatten the dough into a round, wrap it in plastic wrap, and refrigerate for at least an hour, or overnight.

Preheat the oven to 350 degrees F (177 degrees C) and place the rack in the middle of the oven.  Line two baking sheets with parchment paper.

Remove the chilled dough from the refrigerator and form into 1 inch (2.54 cm) balls.  Place the balls of dough on the prepared cookie sheet, spacing about 2 inches (5 cm) apart.  Then, using the bottom of a glass dipped in sugar, flatten each ball of dough to 1/4 inch thick (can also use a cookie stamp).  Sprinkle each cookie with the shaved almonds.  Bake for about 10 - 12 minutes, or until lightly browned around the edges.  Remove from oven and transfer to a wire rack to cool completely. 

Makes about 3 1/2 dozen cookies.