Walnut and Brown Sugar Rugelach

Makes 32

• 1 cup (2 sticks) unsalted butter, room temperature
• 1 bar (8 ounces) cream cheese, room temperature
• 2 tablespoons granulated sugar
• 1/2 teaspoon salt
• 2 cups all-purpose flour (spooned and leveled), plus more for rolling
• 1 large egg, lightly beaten
• 1 cup walnuts, finely chopped
• 1/2 cup packed light-brown sugar

1. In a food processor, blend butter, cream cheese, granulated sugar, and salt until well combined. Add flour, and pulse just until a dough forms. Divide dough in half; flatten into disks, and wrap each in plastic. Refrigerate until firm, at least 2 hours and up to 2 days, or freeze up to 3 months (thaw before baking).
2. Preheat oven to 350 degrees, with racks set in upper and lower thirds. Line two baking sheets with parchment paper; set aside. In a small bowl, combine egg with 1 teaspoon water to make an egg wash.
3. Working with one disk at a time, place dough on lightly floured parchment paper, and roll out into an 11-inch circle (about 1/4 inch thick), dusting lightly with flour as needed. Using a large dinner plate as a guide, cut around dough to make a perfect circle; trim off and discard scraps. Brush circles with egg wash; dividing evenly, sprinkle with walnuts and brown sugar.
4. Using a sharp knife or pizza cutter, cut each circle into 16 equal triangles. Starting from the wide end, roll up each triangle of dough; place on lined baking sheets, seam side down. Brush rolls with egg wash.
5. Bake until golden brown, 30 to 32 minutes. Transfer rugelach to a wire rack to cool completely.