In a medium bowl, add the flour, bakingpowder and salt and with a wire whisk, mix well.
In another medium bowl, add the butter andsugar and with an electric mixer, beaton low speed until creamy.
Add in the egg yolks and vanilla extract andbeat until well combined.
Add the flour mixture and beat on low speeduntil a soft dough forms.
Divide the dough into2 equal-sized portionsand shape each into a log.
With plastic wrap, cover each dough log andrefrigerate for at least 1 hour.
Arrange a rack the bottom portion of oven
1. Preheat your oven to 350 °F.
Grease an 8 ½-x11-inch glass baking dish withcookingspray.
Shred1dough log on the large holes of a boxgrater into the prepared baking dish and spread evenly.
Place the jam over the dough and with aspoon, gently spread in an even layer.
Grate the second log of dough on top of jamevenly.
With a rubber spatula, spread the dough overjam evenly.
Bake for about 35 minutes.
After 18 minutes of cooking, cover the bakingdish with a piece of foil.
Remove the baking dish from oven and placeonto a wire rack to cool completely before cutting.
Cut into 24 bars and serve.