jelly or jam for the filling(your choice of flavour, see tips above)
Instructions
First toast the hazelnuts in a 350 degree F oven for about 10 minutes, just until lightly toasted. Watch them carefully and stir occasionally, you don't want them to burn. Once done, let cool completely.
1 cup hazelnuts
In a bowl sift together the flour, sugar, baking powder, salt, and cinnamon.
Use a food processor to pulse the cooled toasted hazelnuts with 1/4 cup of the flour mixture, until fine. Then add remaining flour mixture and pulse.
Add the butter and pulse once again until the mixture looks like coarse crumbs (see image above for reference).
1 cup butter
Transfer the mixture to a bowl and use a fork to blend in the egg yolks and vanilla until the dough comes together.
3 large egg yolks, 2 tsp vanilla extract
Shape the dough into two disks, wrap in parchment paper, and let chill in refrigerator for 30 minutes. NOTE: The reason for the 2 disks is so that the cookies can be made in 2 batches - I roll out and shape one disk, while the other disk of dough remains in the fridge to stay cool. Warm dough does not roll out well.
Remove one disk from the fridge and roll it between two pieces of parchment paper to 1/8 inch thickness. If it's too stiff to roll, let it sit for a few minutes to warm up slightly.
Leave the dough on the parchment paper and set it on a baking sheet. Refrigerate for another 30 minutes.
Remove from the fridge and cut with cookie cutters, I like to use a star cutter, but you can use any shape you like. Cut out 48 star shapes with the medium cutter then place the cookies on a parchment paper lined cookie sheet.
Now cut out the centres from 24 cookies using the small cutter. You can bake these small centre stars too!
Bake for 10 to 12 minutes at 350 degrees F. (bake each cookie sheet separately)
Remove from the oven and let cool.
Dust the tops of the star shaped cookies with powdered sugar. Make sure to do this before placing the tops over the jelly covered bottoms.
powdered sugar for dusting
Spread the jam or jelly filling on the bottom cookie, then gently set the star cookie (with the cut out centre) on top. Don't press or it will break. TIP: I like to slightly warm up the jelly so it's easier to spread.
jelly or jam for the filling
Let sit for at least a couple of hours or even over night.