In a food processor fitted with a blade, pulse the almonds until fine to make almond flour.
In a medium-sized bowl whisk together the almond flour, all-purpose flour, and baking powder.
In a large bowl beat together the butter and sugar, until creamy, about 5 minutes.
Add the egg yolk.
Cut the vanilla bean in half. Scrap out one side of the podinto the bowl.
Beat for one minute.
Add the flour/almondmixture to the butter/sugar mixture
Beat on low speed until just combined.
Divide the dough intotwo round discs. Wrap in plastic wrap and refrigerate for at least 1 hour.
Remove the dough from the fridge and let it warm up slightlyon the countertop.
Line two baking sheets with parchment paper.
Roll the dough out to1/8 inch thick.
Cut out an equal number of cookies.
For top cookies cut out a centre piece with a smallercutter.
Place on the cookie tray and into the refrigerator for 30minutes.
Preheat the oven to 350 F.
Bake for 12 to 15 minutes.
Cool for 5 minutes and then remove the cookies onto a wirerack.