Apricot Hamantaschen

Bahan-bahan (30 porsi)

• 1 cup confectioners' sugar
• 2¼ cups all-purpose flour, (spooned into measuring cup and leveled-off (plus more for rolling the dough))
• ¾ teaspoon salt
• 2 sticks (1 cup) unsalted butter, (cut into cubes, very cold)
• 3 large egg yolks, (divided)
• 1 to 2 tablespoons ice cold water
• ¾ cup apricot jam, (best quality such as Bonne Maman)