Brown Sugar Pop-Tart Perfection: Nostalgic & Homemade!

Ingredients

• 2 ½ cups (315g) all-purpose flour, plus more for dusting
• 1 teaspoon (5g) salt
• 1 cup (227g) cold unsalted butter, cut into ½-inch cubes
• ½ cup (120ml) ice water
• 1 large egg, beaten (for egg wash)
• 2 tablespoons milk (for egg wash)
• 1 cup (200g) packed light brown sugar
• 2 tablespoons (16g) all-purpose flour
• 2 tablespoons (28g) unsalted butter, softened
• 2 teaspoons ground cinnamon
• ¼ teaspoon ground nutmeg
• 1 tablespoon (15ml) milk
• 1 ½ cups (180g) confectioners’ sugar
• 3-4 tablespoons (45-60ml) milk, or as needed
• Sprinkles (optional)