For the shortbread, in a mixing bowl combine bu:er and,granulated sugar.
Mix using either a paddle a:achment or an electric whisk on a low speed for 2-3 minutes.
Scrape,down the sides in between as it is mixing to make sure it is creamy and fully incorporated. Then add vanilla extract,and mix.
Next add all-purpose flour, cornstarch, and salt to the bu:er mixture. Mix on low speed for 1-2 minutes unTl the dough comes together.
Place the dough in a plastic wrap making sure it is Tightly wrapped and chill it in the refrigeratorfor 1 hour at least.
While the dough is chilling, grease a baking tray with baking spray and line it with parchment paper.
Then lightly flour a piece of parchment paper or a clean surface as well as the dough and the rolling pin.
Roll the shortbread dough about ¼ inch thick. Dock the rolled dough with a fork.
Then, use a round cookie cutter about 2 inch wide to cut out circles of the shortbread cookies.
If the dough becomes soft, then you can chill it for 15-20 minutes otherwise peel back the dough and use a spatula to transfer the precut cookies to your prepared baking tray.
Cut out the centers of half the cookies with a ½ inch wide round flower shaped cu:er or use the end of a piping Tip.
You can gather all the scraps and roll the dough to prepare more cookies. Alternatively, you can wrap the dough in plasTc wrap and freeze it for future use.
Preheat the oven to 330 F. Chill the precut cookies in the refrigerator unTl you preheat the oven.
Then bake the cookies in the oven for 10-11 minutes or unTl the edges are golden brown.
Carefully remove the baking tray from the oven and let the cookies cool completely.
When the shortbread cookies have cooled, you can place 2 tsp of raspberry jam on the bo:oms of whole cookie.
Then top it with the cut-out cookie to sandwich them together. Repeat for all cookies.
Lightly dust the tops with powdered sugar on all the raspberry shortbread sandwich cookies and place in an airTght container and store in the refrigerator for up to 2-3 days.