Blackberry Shortbread Bars

• 2 cups unsalted butter, softened
• 4 egg yolks
• 4 cups all-purpose flour
• 2 cups white sugar
• 2 teaspoons baking powder
• 1 teaspoon ground cardamom
• 1/3 teaspoon salt
• 1 cup blackberry jam, at room temperature
• 1/4 cup confectioners' sugar

1. Beat butter in a bowl with an electric mixer until light and fluffy. Add egg yolks to butter one at a time, blending well after each addition.
2. Mix flour, white sugar, baking powder, cardamom, and salt together in a bowl. Stir flour mixture into butter mixture until just combined. Divide dough in half and wrap each tightly in plastic wrap. Freeze for at least 3 hours.
3. Preheat oven to 350 degrees F (175 degrees C).
4. Grate 1 ball of frozen dough evenly into the bottom of a 9x13-inch baking pan. Spread blackberry jam over grated dough, leaving 1/2-inch space around the edges. Grate the second ball of frozen dough over the jam.
5. Bake in the preheated oven until golden brown, 30 to 40 minutes. After shortbread cools, sprinkle with confectioners' sugar and cut into bars.

unsalted butter, egg yolks, allpurpose, white sugar, baking powder, ground cardamom, salt, blackberry, confectioners

Taken from www.allrecipes.com/recipe/233784/blackberry-shortbread-bars/ (may not work)