Preheat oven to 350°F. Line a 8-inch square pan with parchment paper and lightly spray with cooking spray.
In a stand mixer or a large bowl with a hand mixer, beat together butter, sugar, orange zest and salt until the mixture is airy.
Add flour and slowly incorporate into the butter sugar mixture. Once combined, press the dough into the prepared pan. Prick with the dough all over with a fork. Bake 15 minutes.
Make the Filling
Whisk together the yolks, sweetened condensed milk and blood orange juice until combined.
Make the Bars
Once the dough is baked, immediately spread the raspberry jam over the dough. Then pour the Blood Orange filling over the jam. Bake until set, 25 to 30 minutes.
Allow the bars to cool in the pan and then refrigerate for at least 2 hours. Cut into 16 bars, serve with powdered sugar and fresh raspberries