Line 2 cookie sheets with parchment paper or silpats.
In a stand mixer add the shortening and butter and mix well.
Add the sour cream and vanilla and mix until creamy.
Add the sweeteners and beat well.
Add the egg and beat until batter is light and fluffy.
Add the dry ingredients and mix on low speed until all mixed well.
Remove batter and make into a ball.
Place in refer for at least 30 min to chill.
Preheat oven to 350 degrees.
Remove dough and cut in 1/2.
Roll dough onto a floured surface.
I like to use tapioca starch for this.
Use a cookie cutter to cut out shape.
Use a small circle cutter to cut hole in middle of one cookie.
Place on lined cookie sheet and bake for 8 minutes.
Remove and repeat process.
Once cookies are cooled you can spread jam on one cookie and top with the cut out cookie.
Sprinkle icing sugar on cookies.