In a large mixing bowl or kitchen aid, mix together the butter and 1 cup powdered sugar. Mix until well combined. Pour in the egg yolks. Mix well.
Now add the vanilla, salt, cinnamon, lemon juice, and lemon extract. Stir until just incorporated.
Next step is to add in both flours. Mix until incorporated but don't over mix.
Dump out onto the counter top and form into two balls. Wrap each one in plastic wrap and chill for 1 hour, up to a couple days.
To bake cookies.
Pre-heat oven to 350°F
On a floured surface, roll out one of the chilled dough balls. We want the thickness at about 1/4 of a inch. You can aslo roll between to pieces of parchment paper for easy clean up Using a 1 1/2 -2 inch cookie cutter cut out as many cookies as you can. Place on a parchment lined baking sheet about 1 inch apart.Any leftover dough, roll back up and chill until ready to make more cut outs. Bake for 10-12 minutes, let rest for 5, then transfer to cooling rack or parchment paper.
Now using the second ball of dough, cut out and add a middle cut out so the jam will show through. For instance I used a circle cookie cutter and a smaller cutter to make a hole/shape in the top layer.
Bake for 9-10 minutes, let rest for 5, then transfer to cooling rack or parchment paper.
Continue baking until all the dough is used and you have even top and bottoms.
Line up all the tops and sift powdered sugar on top. Set aside.
Using the bottom cookie, spread a small and even amount of jam(or pipe on with a piping bag), then top with sugared cookie. Continue until all the cookies are filled.
Store for 1 week in a airtight container or freeze for 3 months.
ENJOY!