Rugelach

INGREDIENTS

• 2 sticks (1 cup) unsalted butter, room temperature
• 8 ounces cream cheese, room temperature
• ¾ cup granulated sugar
• ¼ teaspoon plus a pinch of salt
• 1 large whole egg, plus 3 large egg yolks
• 2-1/3 cups all-purpose flour, plus more for dusting
• 1 teaspoon pure vanilla extract
• 1¼ cups (4 ounces) walnut halves or pieces
• Pinch of ground cinnamon
• 1 cup plus 2 tablespoons (12 ounces) apricot jelly, melted
• 2 cups currants, raisins or other dried fruit, or mini chocolate chips
• Fine sanding sugar (or granulated sugar), for sprinkling