Cheese Bouchées from The Official Downton Abbey Afternoon Tea Cookbook by Downton Abbey

Ingredients

• 1⅓ cups (165 g) flour, plus more for the work surface
• 6 tablespoons (90 g) cold salted butter, cut into small cubes
• 4–5 tablespoons (60–75 ml) ice-cold water
• Salt and black pepper
• Milk, for sealing and brushing
• Pinch of cayenne pepper (optional)
• 1 tablespoon salted butter, melted and cooled
• ¼ cup (30 g) grated Parmesan cheese
• ¼ cup (30 g) grated sharp Cheddar cheese
• 1 egg