Cinnamon-Walnut Rugelach | America's Test Kitchen

Ingredients

• 1 1/2 cups (7½ ounces/213 grams) all-purpose flour
• 1/4 cup (1¾ ounces/50 grams) granulated sugar
• 1/2 teaspoon table salt , divided
• 6 ounces (170 grams) cream cheese , cut into 3 pieces and chilled
• 10 tablespoons unsalted butter , cut into 1⁄2-inch pieces and chilled
• 1/4 cup sour cream
• 1/2 cup walnuts
• 1/2 cup packed (3½ ounces/99 grams) brown sugar
• 1 1/2 teaspoons ground cinnamon
• 1 large egg , beaten with 1 tablespoon water
• 1 tablespoon demerara sugar