Beat the butter with the sugar and cinnamon until light and fluffy, 2-3 minutes.
170 grams Butter (softened), 100 grams White Sugar, 1 tsp Cinnamon
While the butter is mixing, combine the all-purpose flour, almond flour, and salt and set aside until ready to use.
160 grams All-Purpose Flour, 72 grams Almond Flour, 1 pinch Sea Salt
Once the butter has mixed, add the egg yolk and vanilla and beat until fully incorporated.
1 Large Egg Yolk, 1 tsp Vanilla Extract
Mix the dry ingredients into the wet ingredients and mix until just combined, you don't want to overmix, otherwise the cookies will be very dense and tough.
Divide the dough in half and press each half down into a disc shape and wrap each half in plastic wrap. Place in the refrigerator to cool for at least an hour.
After an hour, take the dough out of the fridge and allow to warm up for 5-10 minutes so that the dough is workable but not so soft that its sticking to everything.
On a floured surface, roll out half of the dough to a sheet roughy 1/8" thick. Then using the cookie cutter, cut out rounds and place them on a baking tray lined with parchment paper. You can combine dough scraps and re roll the dough until you get 15 cookies. Place the tray in the refrigerator to cool for at least 30 minutes. Repeat with the other half of the dough. Before placing the second tray in the fridge to cool, using a small cookie cutter or frosting piping tip, cut out the middle of each cookie round so that there is a little hole for the jam to peek through. Place tray in the fridge to cool for 30 minutes and start preheating your oven to 350 degrees F.
Bake the cookies at 350 deg F for 12-15 minutes or until the edges of the cookies are starting to get golden brown. Let the cookies cool for 5 minutes in the tray before transferring the cookies to a cooling rack to cool entirely.
For the half of the cookies with the cutouts in the middle, place on the cooling tray and dust with powdered sugar until completely covered.
Take a dollop of the jam, roughly 3/4 tsp and spread on one of the cookies without a cutout. Top with the cutout piece, powdered sugar side up. Repeat with the rest of the pieces until all cookies are fully assembled.
Cookies should be stored at room temperature and eaten within several days.